diff --git a/CHANGELOG.md b/CHANGELOG.md
index 14c79f32..dfccf21f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -12,7 +12,29 @@ We use [Break Versioning][breakver]. The version numbers follow a `<major>.<mino
 
 [breakver]: https://github.com/ptaoussanis/encore/blob/master/BREAK-VERSIONING.md
 
-## 0.4.0-SNAPSHOT
+## 0.4.2 (2020-01-17)
+
+### `reitit`
+
+* Updated deps:
+
+```
+[com.fasterxml.jackson.core/jackson-core "2.10.0"]
+```
+
+* See https://clojureverse.org/t/depending-on-the-right-versions-of-jackson-libraries/5111
+
+## 0.4.1 (2020-01-14)
+
+### `reitit`
+
+* Updated deps:
+
+```
+[metosin/reitit-malli "0.4.1"]
+```
+
+## 0.4.0 (2020-01-14)
 
 * Updated deps:
 
diff --git a/README.md b/README.md
index 62acf913..3ea6c8d9 100644
--- a/README.md
+++ b/README.md
@@ -50,7 +50,7 @@ There is [#reitit](https://clojurians.slack.com/messages/reitit/) in [Clojurians
 All main modules bundled:
 
 ```clj
-[metosin/reitit "0.3.10"]
+[metosin/reitit "0.4.2"]
 ```
 
 Optionally, the parts can be required separately.
diff --git a/doc/README.md b/doc/README.md
index 3d91f07a..3b4045ab 100644
--- a/doc/README.md
+++ b/doc/README.md
@@ -40,7 +40,7 @@ There is [#reitit](https://clojurians.slack.com/messages/reitit/) in [Clojurians
 All bundled:
 
 ```clj
-[metosin/reitit "0.3.10"]
+[metosin/reitit "0.4.2"]
 ```
 
 Optionally, the parts can be required separately.
diff --git a/doc/SUMMARY.md b/doc/SUMMARY.md
index 9e3f9e65..111f0ccf 100644
--- a/doc/SUMMARY.md
+++ b/doc/SUMMARY.md
@@ -34,6 +34,7 @@
 * [Transforming Middleware Chain](ring/transforming_middleware_chain.md)
 * [Middleware Registry](ring/middleware_registry.md)
 * [Default Middleware](ring/default_middleware.md)
+* [Content Negotiation](ring/content_negotiation.md)
 * [Ring Coercion](ring/coercion.md)
 * [Route Data Validation](ring/route_data_validation.md)
 * [Compiling Middleware](ring/compiling_middleware.md)
diff --git a/doc/basics/error_messages.md b/doc/basics/error_messages.md
index c71fa8d5..c8888df8 100644
--- a/doc/basics/error_messages.md
+++ b/doc/basics/error_messages.md
@@ -22,7 +22,7 @@ The default exception formatting uses `reitit.exception/exception`. It produces
 ## Pretty Errors
 
 ```clj
-[metosin/reitit-dev "0.3.10"]
+[metosin/reitit-dev "0.4.2"]
 ```
 
 For human-readable and developer-friendly exception messages, there is `reitit.dev.pretty/exception` (in the `reitit-dev` module). It is inspired by the lovely errors messages of [ELM](https://elm-lang.org/blog/compiler-errors-for-humans) and [ETA](https://twitter.com/jyothsnasrin/status/1037703436043603968) and uses [fipp](https://github.com/brandonbloom/fipp), [expound](https://github.com/bhb/expound) and [spell-spec](https://github.com/bhauman/spell-spec) for most of heavy lifting.
@@ -51,4 +51,4 @@ See the [validating route data](route_data_validation.md) page.
 
 ## Runtime Exception
 
-See [Exception Handling with Ring](../ring/exceptions.md).
+See [Exception Handling with Ring](exceptions.md).
diff --git a/doc/http/default_interceptors.md b/doc/http/default_interceptors.md
index cd6c6b93..8a5dbc0b 100644
--- a/doc/http/default_interceptors.md
+++ b/doc/http/default_interceptors.md
@@ -1,7 +1,7 @@
 # Default Interceptors
 
 ```clj
-[metosin/reitit-interceptors "0.3.10"]
+[metosin/reitit-interceptors "0.4.2"]
 ```
 
 Just like the [ring default middleware](../ring/default_middleware.md), but for interceptors.
diff --git a/doc/http/interceptors.md b/doc/http/interceptors.md
index f680e5d0..f33c6acc 100644
--- a/doc/http/interceptors.md
+++ b/doc/http/interceptors.md
@@ -5,7 +5,7 @@ Reitit also support for [interceptors](http://pedestal.io/reference/interceptors
 ## Reitit-http
 
 ```clj
-[metosin/reitit-http "0.3.10"]
+[metosin/reitit-http "0.4.2"]
 ```
 
 An module for http-routing using interceptors instead of middleware. Builds on top of the [`reitit-ring`](../ring/ring.md) module having all the same features.
diff --git a/doc/http/pedestal.md b/doc/http/pedestal.md
index c3563732..ac9499fb 100644
--- a/doc/http/pedestal.md
+++ b/doc/http/pedestal.md
@@ -3,7 +3,7 @@
 [Pedestal](http://pedestal.io/) is a backend web framework for Clojure. `reitit-pedestal` provides an alternative routing engine for Pedestal.
 
 ```clj
-[metosin/reitit-pedestal "0.3.10"]
+[metosin/reitit-pedestal "0.4.2"]
 ```
 
 Why should one use reitit instead of the Pedestal [default routing](http://pedestal.io/reference/routing-quick-reference)?
@@ -26,8 +26,8 @@ A minimalistic example on how to to swap the default-router with a reitit router
 ```clj
 ; [io.pedestal/pedestal.service "0.5.5"]
 ; [io.pedestal/pedestal.jetty "0.5.5"]
-; [metosin/reitit-pedestal "0.3.10"]
-; [metosin/reitit "0.3.10"]
+; [metosin/reitit-pedestal "0.4.2"]
+; [metosin/reitit "0.4.2"]
 
 (require '[io.pedestal.http :as server])
 (require '[reitit.pedestal :as pedestal])
diff --git a/doc/http/sieppari.md b/doc/http/sieppari.md
index d397d151..8585c254 100644
--- a/doc/http/sieppari.md
+++ b/doc/http/sieppari.md
@@ -1,7 +1,7 @@
 # Sieppari
 
 ```clj
-[metosin/reitit-sieppari "0.3.10"]
+[metosin/reitit-sieppari "0.4.2"]
 ```
 
 [Sieppari](https://github.com/metosin/sieppari) is a new and fast interceptor implementation for Clojure, with pluggable async supporting [core.async](https://github.com/clojure/core.async), [Manifold](https://github.com/ztellman/manifold) and [Promesa](http://funcool.github.io/promesa/latest).
diff --git a/doc/http/transforming_interceptor_chain.md b/doc/http/transforming_interceptor_chain.md
index 7c74b61a..db4f98f2 100644
--- a/doc/http/transforming_interceptor_chain.md
+++ b/doc/http/transforming_interceptor_chain.md
@@ -65,7 +65,7 @@ There is an extra option in http-router (actually, in the underlying interceptor
 ### Printing Context Diffs
 
 ```clj
-[metosin/reitit-interceptors "0.3.10"]
+[metosin/reitit-interceptors "0.4.2"]
 ```
 
 Using `reitit.http.interceptors.dev/print-context-diffs` transformation, the context diffs between each interceptor are printed out to the console. To use it, add the following router option:
diff --git a/doc/ring/content_negotiation.md b/doc/ring/content_negotiation.md
new file mode 100644
index 00000000..90605ad7
--- /dev/null
+++ b/doc/ring/content_negotiation.md
@@ -0,0 +1,138 @@
+# Content Negotiation
+
+Wrapper for [Muuntaja](https://github.com/metosin/muuntaja) middleware for content-negotiation, request decoding and response encoding. Takes explicit configuration via `:muuntaja` key in route data. Emit's [swagger](swagger.md) `:produces` and `:consumes` definitions automatically based on the Muuntaja configuration.
+
+Negotiates a request body based on `Content-Type` header and response body based on `Accept`, `Accept-Charset` headers. Publishes the negotiation results as `:muuntaja/request` and `:muuntaja/response` keys into the request.
+
+Decodes the request body into `:body-params` using the `:muuntaja/request` key in request if the `:body-params` doesn't already exist.
+
+Encodes the response body using the `:muuntaja/response` key in request if the response doesn't have `Content-Type` header already set.
+
+Expected route data:
+
+| key          | description |
+| -------------|-------------|
+| `:muuntaja`  | `muuntaja.core/Muuntaja` instance, does not mount if not set.
+
+```clj
+(require '[reitit.ring.middleware.muuntaja :as muuntaja])
+```
+
+* `muuntaja/format-middleware` - Negotiation, request decoding and response encoding in a single Middleware
+* `muuntaja/format-negotiate-middleware` - Negotiation
+* `muuntaja/format-request-middleware` - Request decoding
+* `muuntaja/format-response-middleware` - Response encoding
+
+```clj
+(require '[reitit.ring :as ring])
+(require '[reitit.ring.coercion :as rrc])
+(require '[reitit.coercion.spec :as rcs])
+(require '[ring.adapter.jetty :as jetty])
+(require '[muuntaja.core :as m])
+
+(def app
+  (ring/ring-handler
+    (ring/router
+      [["/math"
+        {:post {:summary "negotiated request & response (json, edn, transit)"
+                :parameters {:body {:x int?, :y int?}}
+                :responses {200 {:body {:total int?}}}
+                :handler (fn [{{{:keys [x y]} :body} :parameters}]
+                           {:status 200
+                            :body {:total (+ x y)}})}}]
+       ["/xml"
+        {:get {:summary "forced xml response"
+               :handler (fn [_]
+                          {:status 200
+                           :headers {"Content-Type" "text/xml"}
+                           :body "<kikka>kukka</kikka>"})}}]]
+      {:data {:muuntaja m/instance
+              :coercion rcs/coercion
+              :middleware [muuntaja/format-middleware
+                           rrc/coerce-exceptions-middleware
+                           rrc/coerce-request-middleware
+                           rrc/coerce-response-middleware]}})))
+
+(jetty/run-jetty #'app {:port 3000, :join? false})
+```
+
+Testing with [httpie](https://httpie.org/):
+
+```bash
+> http POST :3000/math x:=1 y:=2
+
+HTTP/1.1 200 OK
+Content-Length: 11
+Content-Type: application/json; charset=utf-8
+Date: Wed, 22 Aug 2018 16:59:54 GMT
+Server: Jetty(9.2.21.v20170120)
+
+{
+ "total": 3
+}
+```
+
+```bash
+> http :3000/xml
+
+HTTP/1.1 200 OK
+Content-Length: 20
+Content-Type: text/xml
+Date: Wed, 22 Aug 2018 16:59:58 GMT
+Server: Jetty(9.2.21.v20170120)
+
+<kikka>kukka</kikka>
+```
+
+
+## Changing default parameters
+
+The current JSON formatter used by `reitit` already have the option to parse keys as `keyword` which is a sane default in Clojure. However, if you would like to parse all the `double` as `bigdecimal` you'd need to change an option of the [JSON formatter](https://github.com/metosin/jsonista)
+
+
+```clj
+(def new-muuntaja-instance
+  (m/create
+   (assoc-in
+    m/default-options
+    [:formats "application/json" :decoder-opts :bigdecimals]
+    true)))
+
+```
+
+Now you should change the `m/instance` installed in the router with the `new-muuntaja-instance`.
+
+You can find more options for [JSON](https://cljdoc.org/d/metosin/jsonista/0.2.5/api/jsonista.core#object-mapper) and [EDN].
+
+
+## Adding custom encoder
+
+The example below is from `muuntaja` explaining how to add a custom encoder to parse a `java.util.Date` instance.
+
+```clj
+
+(def muuntaja-instance
+  (m/create
+    (assoc-in
+      m/default-options
+      [:formats "application/json" :encoder-opts]
+      {:date-format "yyyy-MM-dd"})))
+
+(->> {:value (java.util.Date.)}
+     (m/encode m "application/json")
+     slurp)
+; => "{\"value\":\"2019-10-15\"}"
+
+```
+
+## Adding all together
+
+If you inspect `m/default-options` it's only a map, therefore you can compose your new muuntaja instance with as many options as you need it.
+
+```clj
+(def new-muuntaja
+  (m/create
+   (-> m/default-options
+       (assoc-in [:formats "application/json" :decoder-opts :bigdecimals] true)
+       (assoc-in [:formats "application/json" :encoder-opts :data-format] "yyyy-MM-dd"))))
+```
diff --git a/doc/ring/default_middleware.md b/doc/ring/default_middleware.md
index 99db660e..5dc1a33d 100644
--- a/doc/ring/default_middleware.md
+++ b/doc/ring/default_middleware.md
@@ -1,7 +1,7 @@
 # Default Middleware
 
 ```clj
-[metosin/reitit-middleware "0.3.10"]
+[metosin/reitit-middleware "0.4.2"]
 ```
 
 Any Ring middleware can be used with `reitit-ring`, but using data-driven middleware is preferred as they are easier to manage and in many cases, yield better performance. `reitit-middleware` contains a set of common ring middleware, lifted into data-driven middleware.
@@ -23,91 +23,6 @@ Any Ring middleware can be used with `reitit-ring`, but using data-driven middle
 
 See [Exception Handling with Ring](exceptions.md).
 
-## Content Negotiation
-
-Wrapper for [Muuntaja](https://github.com/metosin/muuntaja) middleware for content-negotiation, request decoding and response encoding. Takes explicit configuration via `:muuntaja` key in route data. Emit's [swagger](swagger.md) `:produces` and `:consumes` definitions automatically based on the Muuntaja configuration.
-
-Negotiates a request body based on `Content-Type` header and response body based on `Accept`, `Accept-Charset` headers. Publishes the negotiation results as `:muuntaja/request` and `:muuntaja/response` keys into the request.
- 
-Decodes the request body into `:body-params` using the `:muuntaja/request` key in request if the `:body-params` doesn't already exist.
- 
-Encodes the response body using the `:muuntaja/response` key in request if the response doesn't have `Content-Type` header already set.
-
-Expected route data:
- 
-| key          | description |
-| -------------|-------------|
-| `:muuntaja`  | `muuntaja.core/Muuntaja` instance, does not mount if not set.
-
-```clj
-(require '[reitit.ring.middleware.muuntaja :as muuntaja])
-```
-
-* `muuntaja/format-middleware` - Negotiation, request decoding and response encoding in a single Middleware
-* `muuntaja/format-negotiate-middleware` - Negotiation
-* `muuntaja/format-request-middleware` - Request decoding
-* `muuntaja/format-response-middleware` - Response encoding
-
-```clj
-(require '[reitit.ring :as ring])
-(require '[reitit.ring.coercion :as rrc])
-(require '[reitit.coercion.spec :as rcs])
-(require '[ring.adapter.jetty :as jetty])
-
-(def app
-  (ring/ring-handler
-    (ring/router
-      [["/math"
-        {:post {:summary "negotiated request & response (json, edn, transit)"
-                :parameters {:body {:x int?, :y int?}}
-                :responses {200 {:body {:total int?}}}
-                :handler (fn [{{{:keys [x y]} :body} :parameters}]
-                           {:status 200
-                            :body {:total (+ x y)}})}}]
-       ["/xml"
-        {:get {:summary "forced xml response"
-               :handler (fn [_]
-                          {:status 200
-                           :headers {"Content-Type" "text/xml"}
-                           :body "<kikka>kukka</kikka>"})}}]]
-      {:data {:muuntaja m/instance
-              :coercion rcs/coercion
-              :middleware [muuntaja/format-middleware
-                           rrc/coerce-exceptions-middleware
-                           rrc/coerce-request-middleware
-                           rrc/coerce-response-middleware]}})))
-
-(jetty/run-jetty #'app {:port 3000, :join? false})
-```
-
-Testing with [httpie](https://httpie.org/):
-
-```bash
-> http POST :3000/math x:=1 y:=2
-
-HTTP/1.1 200 OK
-Content-Length: 11
-Content-Type: application/json; charset=utf-8
-Date: Wed, 22 Aug 2018 16:59:54 GMT
-Server: Jetty(9.2.21.v20170120)
-
-{
- "total": 3
-}
-```
-
-```bash
-> http :3000/xml
-
-HTTP/1.1 200 OK
-Content-Length: 20
-Content-Type: text/xml
-Date: Wed, 22 Aug 2018 16:59:58 GMT
-Server: Jetty(9.2.21.v20170120)
-
-<kikka>kukka</kikka>
-```
-
 ## Multipart Request Handling
 
 Wrapper for [Ring Multipart Middleware](https://github.com/ring-clojure/ring/blob/master/ring-core/src/ring/middleware/multipart_params.clj). Emits swagger `:consumes` definitions automatically.
diff --git a/doc/ring/exceptions.md b/doc/ring/exceptions.md
index 1d484799..58b16648 100644
--- a/doc/ring/exceptions.md
+++ b/doc/ring/exceptions.md
@@ -1,7 +1,7 @@
 # Exception Handling with Ring
 
 ```clj
-[metosin/reitit-middleware "0.3.10"]
+[metosin/reitit-middleware "0.4.2"]
 ```
 
 Exceptions thrown in router creation can be [handled with custom exception handler](../basics/error_messages.md). By default, exceptions thrown at runtime from a handler or a middleware are not caught by the `reitit.ring/ring-handler`. A good practise is a have an top-level exception handler to log and format the errors for clients.
diff --git a/doc/ring/ring.md b/doc/ring/ring.md
index 2c74eeac..2bb622aa 100644
--- a/doc/ring/ring.md
+++ b/doc/ring/ring.md
@@ -5,7 +5,7 @@
 Read more about the [Ring Concepts](https://github.com/ring-clojure/ring/wiki/Concepts).
 
 ```clj
-[metosin/reitit-ring "0.3.10"]
+[metosin/reitit-ring "0.4.2"]
 ```
 
 ## `reitit.ring/ring-router`
diff --git a/doc/ring/swagger.md b/doc/ring/swagger.md
index c7c240a5..a30226b5 100644
--- a/doc/ring/swagger.md
+++ b/doc/ring/swagger.md
@@ -1,7 +1,7 @@
 # Swagger Support
 
 ```
-[metosin/reitit-swagger "0.3.10"]
+[metosin/reitit-swagger "0.4.2"]
 ```
 
 Reitit supports [Swagger2](https://swagger.io/) documentation, thanks to [schema-tools](https://github.com/metosin/schema-tools) and [spec-tools](https://github.com/metosin/spec-tools). Documentation is extracted from route definitions, coercion `:parameters` and `:responses` and from a set of new documentation keys.
@@ -44,7 +44,7 @@ If you need to post-process the generated spec, just wrap the handler with a cus
 [Swagger-ui](https://github.com/swagger-api/swagger-ui) is a user interface to visualize and interact with the Swagger specification. To make things easy, there is a pre-integrated version of the swagger-ui as a separate module.
 
 ```
-[metosin/reitit-swagger-ui "0.3.10"]
+[metosin/reitit-swagger-ui "0.4.2"]
 ```
 
 `reitit.swagger-ui/create-swagger-ui-hander` can be used to create a ring-handler to serve the swagger-ui. It accepts the following options:
diff --git a/doc/ring/transforming_middleware_chain.md b/doc/ring/transforming_middleware_chain.md
index 7e7711f8..c182b43d 100644
--- a/doc/ring/transforming_middleware_chain.md
+++ b/doc/ring/transforming_middleware_chain.md
@@ -59,7 +59,7 @@ There is an extra option in ring-router (actually, in the underlying middleware-
 ### Printing Request Diffs
 
 ```clj
-[metosin/reitit-middleware "0.3.10"]
+[metosin/reitit-middleware "0.4.2"]
 ```
 
 Using `reitit.ring.middleware.dev/print-request-diffs` transformation, the request diffs between each middleware are printed out to the console. To use it, add the following router option:
diff --git a/examples/frontend-auth/project.clj b/examples/frontend-auth/project.clj
index e9eff0f7..ae4c34fb 100644
--- a/examples/frontend-auth/project.clj
+++ b/examples/frontend-auth/project.clj
@@ -10,9 +10,9 @@
                  [ring "1.7.1"]
                  [hiccup "1.0.5"]
                  [org.clojure/clojurescript "1.10.439"]
-                 [metosin/reitit "0.3.10"]
-                 [metosin/reitit-schema "0.3.10"]
-                 [metosin/reitit-frontend "0.3.10"]
+                 [metosin/reitit "0.4.2"]
+                 [metosin/reitit-schema "0.4.2"]
+                 [metosin/reitit-frontend "0.4.2"]
                  ;; Just for pretty printting the match
                  [fipp "0.6.14"]]
 
diff --git a/examples/frontend-controllers/project.clj b/examples/frontend-controllers/project.clj
index e9eff0f7..ae4c34fb 100644
--- a/examples/frontend-controllers/project.clj
+++ b/examples/frontend-controllers/project.clj
@@ -10,9 +10,9 @@
                  [ring "1.7.1"]
                  [hiccup "1.0.5"]
                  [org.clojure/clojurescript "1.10.439"]
-                 [metosin/reitit "0.3.10"]
-                 [metosin/reitit-schema "0.3.10"]
-                 [metosin/reitit-frontend "0.3.10"]
+                 [metosin/reitit "0.4.2"]
+                 [metosin/reitit-schema "0.4.2"]
+                 [metosin/reitit-frontend "0.4.2"]
                  ;; Just for pretty printting the match
                  [fipp "0.6.14"]]
 
diff --git a/examples/frontend-links/project.clj b/examples/frontend-links/project.clj
index 64615c31..194b0ed0 100644
--- a/examples/frontend-links/project.clj
+++ b/examples/frontend-links/project.clj
@@ -10,9 +10,9 @@
                  [ring "1.7.1"]
                  [hiccup "1.0.5"]
                  [org.clojure/clojurescript "1.10.520"]
-                 [metosin/reitit "0.3.10"]
-                 [metosin/reitit-spec "0.3.10"]
-                 [metosin/reitit-frontend "0.3.10"]
+                 [metosin/reitit "0.4.2"]
+                 [metosin/reitit-spec "0.4.2"]
+                 [metosin/reitit-frontend "0.4.2"]
                  ;; Just for pretty printting the match
                  [fipp "0.6.14"]]
 
diff --git a/examples/frontend-prompt/project.clj b/examples/frontend-prompt/project.clj
index 64615c31..194b0ed0 100644
--- a/examples/frontend-prompt/project.clj
+++ b/examples/frontend-prompt/project.clj
@@ -10,9 +10,9 @@
                  [ring "1.7.1"]
                  [hiccup "1.0.5"]
                  [org.clojure/clojurescript "1.10.520"]
-                 [metosin/reitit "0.3.10"]
-                 [metosin/reitit-spec "0.3.10"]
-                 [metosin/reitit-frontend "0.3.10"]
+                 [metosin/reitit "0.4.2"]
+                 [metosin/reitit-spec "0.4.2"]
+                 [metosin/reitit-frontend "0.4.2"]
                  ;; Just for pretty printting the match
                  [fipp "0.6.14"]]
 
diff --git a/examples/frontend-re-frame/project.clj b/examples/frontend-re-frame/project.clj
index 29454d36..d6279663 100644
--- a/examples/frontend-re-frame/project.clj
+++ b/examples/frontend-re-frame/project.clj
@@ -1,7 +1,7 @@
 (defproject frontend-re-frame "0.1.0-SNAPSHOT"
   :dependencies [[org.clojure/clojure "1.10.0"]
                  [org.clojure/clojurescript "1.10.520"]
-                 [metosin/reitit "0.3.10"]
+                 [metosin/reitit "0.4.2"]
                  [reagent "0.8.1"]
                  [re-frame "0.10.6"]]
 
diff --git a/examples/frontend/project.clj b/examples/frontend/project.clj
index abbde5c3..a815f90c 100644
--- a/examples/frontend/project.clj
+++ b/examples/frontend/project.clj
@@ -10,9 +10,9 @@
                  [ring "1.7.1"]
                  [hiccup "1.0.5"]
                  [org.clojure/clojurescript "1.10.439"]
-                 [metosin/reitit "0.3.10"]
-                 [metosin/reitit-spec "0.3.10"]
-                 [metosin/reitit-frontend "0.3.10"]
+                 [metosin/reitit "0.4.2"]
+                 [metosin/reitit-spec "0.4.2"]
+                 [metosin/reitit-frontend "0.4.2"]
                  ;; Just for pretty printting the match
                  [fipp "0.6.14"]]
 
diff --git a/examples/http-swagger/project.clj b/examples/http-swagger/project.clj
index 5a5cce5d..e25386a3 100644
--- a/examples/http-swagger/project.clj
+++ b/examples/http-swagger/project.clj
@@ -3,5 +3,5 @@
   :dependencies [[org.clojure/clojure "1.10.0"]
                  [ring/ring-jetty-adapter "1.7.1"]
                  [aleph "0.4.7-alpha5"]
-                 [metosin/reitit "0.3.10"]]
+                 [metosin/reitit "0.4.2"]]
   :repl-options {:init-ns example.server})
diff --git a/examples/http/project.clj b/examples/http/project.clj
index ba93693e..d857a76d 100644
--- a/examples/http/project.clj
+++ b/examples/http/project.clj
@@ -5,5 +5,5 @@
                  [funcool/promesa "1.9.0"]
                  [manifold "0.1.8"]
                  [ring/ring-jetty-adapter "1.7.1"]
-                 [metosin/reitit "0.3.10"]]
+                 [metosin/reitit "0.4.2"]]
   :repl-options {:init-ns example.server})
diff --git a/examples/just-coercion-with-ring/project.clj b/examples/just-coercion-with-ring/project.clj
index b206f131..f637fb77 100644
--- a/examples/just-coercion-with-ring/project.clj
+++ b/examples/just-coercion-with-ring/project.clj
@@ -2,4 +2,4 @@
   :description "Reitit coercion with vanilla ring"
   :dependencies [[org.clojure/clojure "1.10.0"]
                  [ring/ring-jetty-adapter "1.7.1"]
-                 [metosin/reitit "0.3.10"]])
+                 [metosin/reitit "0.4.2"]])
diff --git a/examples/pedestal-swagger/project.clj b/examples/pedestal-swagger/project.clj
index bb60d2f0..73ec70f5 100644
--- a/examples/pedestal-swagger/project.clj
+++ b/examples/pedestal-swagger/project.clj
@@ -3,6 +3,6 @@
   :dependencies [[org.clojure/clojure "1.10.0"]
                  [io.pedestal/pedestal.service "0.5.5"]
                  [io.pedestal/pedestal.jetty "0.5.5"]
-                 [metosin/reitit-pedestal "0.3.10"]
-                 [metosin/reitit "0.3.10"]]
+                 [metosin/reitit-pedestal "0.4.2"]
+                 [metosin/reitit "0.4.2"]]
   :repl-options {:init-ns example.server})
diff --git a/examples/pedestal/project.clj b/examples/pedestal/project.clj
index bb60d2f0..73ec70f5 100644
--- a/examples/pedestal/project.clj
+++ b/examples/pedestal/project.clj
@@ -3,6 +3,6 @@
   :dependencies [[org.clojure/clojure "1.10.0"]
                  [io.pedestal/pedestal.service "0.5.5"]
                  [io.pedestal/pedestal.jetty "0.5.5"]
-                 [metosin/reitit-pedestal "0.3.10"]
-                 [metosin/reitit "0.3.10"]]
+                 [metosin/reitit-pedestal "0.4.2"]
+                 [metosin/reitit "0.4.2"]]
   :repl-options {:init-ns example.server})
diff --git a/examples/ring-example/project.clj b/examples/ring-example/project.clj
index f5f5586b..63a920e9 100644
--- a/examples/ring-example/project.clj
+++ b/examples/ring-example/project.clj
@@ -2,5 +2,5 @@
   :description "Reitit Ring App"
   :dependencies [[org.clojure/clojure "1.10.0"]
                  [ring/ring-jetty-adapter "1.7.1"]
-                 [metosin/reitit "0.3.10"]]
+                 [metosin/reitit "0.4.2"]]
   :repl-options {:init-ns example.server})
diff --git a/examples/ring-integrant/project.clj b/examples/ring-integrant/project.clj
index 7db05f24..a58b51a7 100644
--- a/examples/ring-integrant/project.clj
+++ b/examples/ring-integrant/project.clj
@@ -2,7 +2,7 @@
   :description "Reitit Ring App with Integrant"
   :dependencies [[org.clojure/clojure "1.10.1"]
                  [ring/ring-jetty-adapter "1.7.1"]
-                 [metosin/reitit "0.3.10"]
+                 [metosin/reitit "0.4.2"]
                  [integrant "0.7.0"]]
   :main example.server
   :repl-options {:init-ns user}
diff --git a/examples/ring-malli-swagger/project.clj b/examples/ring-malli-swagger/project.clj
index b7d76aa5..5f742d20 100644
--- a/examples/ring-malli-swagger/project.clj
+++ b/examples/ring-malli-swagger/project.clj
@@ -2,6 +2,6 @@
   :description "Reitit Ring App with Swagger"
   :dependencies [[org.clojure/clojure "1.10.0"]
                  [ring/ring-jetty-adapter "1.7.1"]
-                 [metosin/reitit "0.3.10"]]
+                 [metosin/reitit "0.4.2"]]
   :repl-options {:init-ns example.server}
   :profiles {:dev {:dependencies [[ring/ring-mock "0.3.2"]]}})
diff --git a/examples/ring-spec-swagger/project.clj b/examples/ring-spec-swagger/project.clj
index b7d76aa5..5f742d20 100644
--- a/examples/ring-spec-swagger/project.clj
+++ b/examples/ring-spec-swagger/project.clj
@@ -2,6 +2,6 @@
   :description "Reitit Ring App with Swagger"
   :dependencies [[org.clojure/clojure "1.10.0"]
                  [ring/ring-jetty-adapter "1.7.1"]
-                 [metosin/reitit "0.3.10"]]
+                 [metosin/reitit "0.4.2"]]
   :repl-options {:init-ns example.server}
   :profiles {:dev {:dependencies [[ring/ring-mock "0.3.2"]]}})
diff --git a/examples/ring-swagger/project.clj b/examples/ring-swagger/project.clj
index 616d06f1..2b680269 100644
--- a/examples/ring-swagger/project.clj
+++ b/examples/ring-swagger/project.clj
@@ -2,5 +2,5 @@
   :description "Reitit Ring App with Swagger"
   :dependencies [[org.clojure/clojure "1.10.0"]
                  [ring/ring-jetty-adapter "1.7.1"]
-                 [metosin/reitit "0.3.10"]]
+                 [metosin/reitit "0.4.2"]]
   :repl-options {:init-ns example.server})
diff --git a/modules/reitit-core/project.clj b/modules/reitit-core/project.clj
index 7c725bc7..521f8003 100644
--- a/modules/reitit-core/project.clj
+++ b/modules/reitit-core/project.clj
@@ -1,4 +1,4 @@
-(defproject metosin/reitit-core "0.3.10"
+(defproject metosin/reitit-core "0.4.2"
   :description "Snappy data-driven router for Clojure(Script)"
   :url "https://github.com/metosin/reitit"
   :license {:name "Eclipse Public License"
diff --git a/modules/reitit-core/src/reitit/trie.cljc b/modules/reitit-core/src/reitit/trie.cljc
index 6eaa417f..c4622b53 100644
--- a/modules/reitit-core/src/reitit/trie.cljc
+++ b/modules/reitit-core/src/reitit/trie.cljc
@@ -22,7 +22,7 @@
 (defprotocol Matcher
   (match [this i max path])
   (view [this])
-  (depth [this])
+  (depth ^long [this])
   (length [this]))
 
 (defprotocol TrieCompiler
@@ -53,7 +53,7 @@
         :else (recur (inc i))))))
 
 (defn- -keyword [s]
-  (if-let [i (str/index-of s "/")]
+  (if-let [^long i (str/index-of s "/")]
     (keyword (subs s 0 i) (subs s (inc i)))
     (keyword s)))
 
@@ -61,8 +61,8 @@
   (let [bracket? (-> syntax (into-set) :bracket)
         colon? (-> syntax (into-set) :colon)
         -static (fn [from to] (if-not (= from to) [(subs s from to)]))
-        -wild (fn [from to] [(->Wild (-keyword (subs s (inc from) to)))])
-        -catch-all (fn [from to] [(->CatchAll (keyword (subs s (inc from) to)))])]
+        -wild (fn [^long from to] [(->Wild (-keyword (subs s (inc from) to)))])
+        -catch-all (fn [^long from to] [(->CatchAll (keyword (subs s (inc from) to)))])]
     (loop [ss nil, from 0, to 0]
       (if (= to (count s))
         (concat ss (-static from to))
@@ -70,13 +70,13 @@
           (cond
 
             (and bracket? (= \{ c))
-            (let [to' (or (str/index-of s "}" to) (ex/fail! ::unclosed-brackets {:path s}))]
+            (let [^long to' (or (str/index-of s "}" to) (ex/fail! ::unclosed-brackets {:path s}))]
               (if (= \* (get s (inc to)))
                 (recur (concat ss (-static from to) (-catch-all (inc to) to')) (long (inc to')) (long (inc to')))
                 (recur (concat ss (-static from to) (-wild to to')) (long (inc to')) (long (inc to')))))
 
             (and colon? (= \: c))
-            (let [to' (or (str/index-of s "/" to) (count s))]
+            (let [^long to' (or (str/index-of s "/" to) (count s))]
               (if (= 1 (- to' to))
                 (recur ss from (inc to))
                 (recur (concat ss (-static from to) (-wild to to')) (long to') (long to'))))
@@ -115,7 +115,7 @@
                    (and (string? cp) (not= (count cp) (count p))) [(subs p (count cp))]
                    (and (string? p) (not cp)) (-split p)))
         -postcut (fn [[p :as pps]]
-                   (let [i (and p (str/index-of p "/"))]
+                   (let [^long i (and p (str/index-of p "/"))]
                      (if (and i (pos? i))
                        (concat [(subs p 0 i) (subs p i)] (rest pps))
                        pps)))
@@ -128,7 +128,7 @@
 
 (defn- -slice-end [x xs]
   (let [i (if (string? x) (str/index-of x "/"))]
-    (if (and (number? i) (pos? i))
+    (if (and (number? i) (pos? ^long i))
       (concat [(subs x i)] xs)
       xs)))
 
@@ -227,11 +227,11 @@
       (let [size (count path)]
         (reify Matcher
           (match [_ i max p]
-            (if-not (< max (+ i size))
+            (if-not (< ^long max (+ ^long i size))
               (loop [j 0]
                 (if (= j size)
-                  (match matcher (+ i size) max p)
-                  (if (= (get p (+ i j)) (get path j))
+                  (match matcher (+ ^long i size) max p)
+                  (if (= (get p (+ ^long i j)) (get path j))
                     (recur (inc j)))))))
           (view [_] [path (view matcher)])
           (depth [_] (inc (depth matcher)))
@@ -239,8 +239,8 @@
     (wild-matcher [_ key end matcher]
       (reify Matcher
         (match [_ i max path]
-          (if (and (< i max) (not= (get path i) end))
-            (loop [percent? false, j i]
+          (if (and (< ^long i ^long max) (not= (get path i) end))
+            (loop [percent? false, j ^long i]
               (if (= max j)
                 (if-let [match (match matcher max max path)]
                   (assoc-param match key (decode path i max percent?)))
@@ -257,7 +257,7 @@
       (let [match (->Match params data)]
         (reify Matcher
           (match [_ i max path]
-            (if (<= i max) (assoc-param match key (decode path i max true))))
+            (if (<= ^long i ^long max) (assoc-param match key (decode path i max true))))
           (view [_] [key [data]])
           (depth [_] 1)
           (length [_]))))
@@ -271,7 +271,7 @@
                 (or (match (get matchers j) i max path)
                     (recur (inc j))))))
           (view [_] (mapv view matchers))
-          (depth [_] (inc (apply max 0 (map depth matchers))))
+          (depth [_] (inc ^long (apply max 0 (map depth matchers))))
           (length [_]))))
     (-pretty [_ matcher]
       (view matcher))
diff --git a/modules/reitit-dev/project.clj b/modules/reitit-dev/project.clj
index 7d9b928a..b06c9d57 100644
--- a/modules/reitit-dev/project.clj
+++ b/modules/reitit-dev/project.clj
@@ -1,4 +1,4 @@
-(defproject metosin/reitit-dev "0.3.10"
+(defproject metosin/reitit-dev "0.4.2"
   :description "Snappy data-driven router for Clojure(Script)"
   :url "https://github.com/metosin/reitit"
   :license {:name "Eclipse Public License"
diff --git a/modules/reitit-frontend/project.clj b/modules/reitit-frontend/project.clj
index 914e7ebb..142d70a7 100644
--- a/modules/reitit-frontend/project.clj
+++ b/modules/reitit-frontend/project.clj
@@ -1,4 +1,4 @@
-(defproject metosin/reitit-frontend "0.3.10"
+(defproject metosin/reitit-frontend "0.4.2"
   :description "Reitit: Clojurescript frontend routing core"
   :url "https://github.com/metosin/reitit"
   :license {:name "Eclipse Public License"
diff --git a/modules/reitit-http/project.clj b/modules/reitit-http/project.clj
index c094f54b..4cc25583 100644
--- a/modules/reitit-http/project.clj
+++ b/modules/reitit-http/project.clj
@@ -1,4 +1,4 @@
-(defproject metosin/reitit-http "0.3.10"
+(defproject metosin/reitit-http "0.4.2"
   :description "Reitit: HTTP routing with interceptors"
   :url "https://github.com/metosin/reitit"
   :license {:name "Eclipse Public License"
diff --git a/modules/reitit-interceptors/project.clj b/modules/reitit-interceptors/project.clj
index 1f377990..5a2312b8 100644
--- a/modules/reitit-interceptors/project.clj
+++ b/modules/reitit-interceptors/project.clj
@@ -1,4 +1,4 @@
-(defproject metosin/reitit-interceptors "0.3.10"
+(defproject metosin/reitit-interceptors "0.4.2"
   :description "Reitit, common interceptors bundled"
   :url "https://github.com/metosin/reitit"
   :license {:name "Eclipse Public License"
diff --git a/modules/reitit-malli/project.clj b/modules/reitit-malli/project.clj
index 7649f787..a75b99d0 100644
--- a/modules/reitit-malli/project.clj
+++ b/modules/reitit-malli/project.clj
@@ -1,4 +1,4 @@
-(defproject metosin/reitit-malli "0.3.10"
+(defproject metosin/reitit-malli "0.4.2"
   :description "Reitit: Malli coercion"
   :url "https://github.com/metosin/reitit"
   :license {:name "Eclipse Public License"
diff --git a/modules/reitit-malli/src/reitit/coercion/malli.cljc b/modules/reitit-malli/src/reitit/coercion/malli.cljc
index 411843da..45124991 100644
--- a/modules/reitit-malli/src/reitit/coercion/malli.cljc
+++ b/modules/reitit-malli/src/reitit/coercion/malli.cljc
@@ -75,18 +75,18 @@
 ;; swagger
 ;;
 
-(defmulti extract-parameter (fn [in _] in))
+(defmulti extract-parameter (fn [in _ _] in))
 
-(defmethod extract-parameter :body [_ schema]
-  (let [swagger-schema (swagger/transform schema {:in :body, :type :parameter})]
+(defmethod extract-parameter :body [_ schema options]
+  (let [swagger-schema (swagger/transform schema (merge options {:in :body, :type :parameter}))]
     [{:in "body"
       :name (:title swagger-schema "")
       :description (:description swagger-schema "")
       :required (not= :maybe (m/name schema))
       :schema swagger-schema}]))
 
-(defmethod extract-parameter :default [in schema]
-  (let [{:keys [properties required]} (swagger/transform schema {:in in, :type :parameter})]
+(defmethod extract-parameter :default [in schema options]
+  (let [{:keys [properties required]} (swagger/transform schema (merge options {:in in, :type :parameter}))]
     (mapv
       (fn [[k {:keys [type] :as schema}]]
         (merge
@@ -135,7 +135,7 @@
                       (if parameters
                         {:parameters
                          (->> (for [[in schema] parameters
-                                    parameter (extract-parameter in (compile schema))]
+                                    parameter (extract-parameter in (compile schema options) options)]
                                 parameter)
                               (into []))})
                       (if responses
@@ -148,14 +148,14 @@
                                            (update $ :description (fnil identity ""))
                                            (if (:schema $)
                                              (-> $
-                                                 (update :schema compile)
+                                                 (update :schema compile options)
                                                  (update :schema swagger/transform {:type :schema}))
                                              $))]))}))
            (throw
              (ex-info
                (str "Can't produce Schema apidocs for " specification)
                {:type specification, :coercion :schema}))))
-       (-compile-model [_ model _] (compile model))
+       (-compile-model [_ model _] (compile model options))
        (-open-model [_ schema] schema)
        (-encode-error [_ error]
          (cond-> error
@@ -165,9 +165,9 @@
                                      (update :errors (partial map #(update % :schema edn/write-string opts))))
                  (seq error-keys) (select-keys error-keys)))
        (-request-coercer [_ type schema]
-         (-coercer (compile schema) type transformers :decode nil options))
+         (-coercer (compile schema options) type transformers :decode nil options))
        (-response-coercer [_ schema]
-         (let [schema (compile schema)
+         (let [schema (compile schema options)
                encoder (-coercer schema :body transformers :encode nil options)]
            (-coercer schema :response transformers :encode encoder options)))))))
 
diff --git a/modules/reitit-middleware/project.clj b/modules/reitit-middleware/project.clj
index e9ef28d0..67b29781 100644
--- a/modules/reitit-middleware/project.clj
+++ b/modules/reitit-middleware/project.clj
@@ -1,4 +1,4 @@
-(defproject metosin/reitit-middleware "0.3.10"
+(defproject metosin/reitit-middleware "0.4.2"
   :description "Reitit, common middleware bundled"
   :url "https://github.com/metosin/reitit"
   :license {:name "Eclipse Public License"
diff --git a/modules/reitit-pedestal/project.clj b/modules/reitit-pedestal/project.clj
index bd9c9a98..4a525f3f 100644
--- a/modules/reitit-pedestal/project.clj
+++ b/modules/reitit-pedestal/project.clj
@@ -1,4 +1,4 @@
-(defproject metosin/reitit-pedestal "0.3.10"
+(defproject metosin/reitit-pedestal "0.4.2"
   :description "Reitit + Pedestal Integration"
   :url "https://github.com/metosin/reitit"
   :license {:name "Eclipse Public License"
diff --git a/modules/reitit-ring/project.clj b/modules/reitit-ring/project.clj
index b9c01b84..18d17717 100644
--- a/modules/reitit-ring/project.clj
+++ b/modules/reitit-ring/project.clj
@@ -1,4 +1,4 @@
-(defproject metosin/reitit-ring "0.3.10"
+(defproject metosin/reitit-ring "0.4.2"
   :description "Reitit: Ring routing"
   :url "https://github.com/metosin/reitit"
   :license {:name "Eclipse Public License"
diff --git a/modules/reitit-schema/project.clj b/modules/reitit-schema/project.clj
index 15252e0e..540f6d04 100644
--- a/modules/reitit-schema/project.clj
+++ b/modules/reitit-schema/project.clj
@@ -1,4 +1,4 @@
-(defproject metosin/reitit-schema "0.3.10"
+(defproject metosin/reitit-schema "0.4.2"
   :description "Reitit: Plumatic Schema coercion"
   :url "https://github.com/metosin/reitit"
   :license {:name "Eclipse Public License"
diff --git a/modules/reitit-sieppari/project.clj b/modules/reitit-sieppari/project.clj
index 4e63485d..c3f810e4 100644
--- a/modules/reitit-sieppari/project.clj
+++ b/modules/reitit-sieppari/project.clj
@@ -1,4 +1,4 @@
-(defproject metosin/reitit-sieppari "0.3.10"
+(defproject metosin/reitit-sieppari "0.4.2"
   :description "Reitit: Sieppari Interceptors"
   :url "https://github.com/metosin/reitit"
   :license {:name "Eclipse Public License"
diff --git a/modules/reitit-spec/project.clj b/modules/reitit-spec/project.clj
index e6544e88..26b2cd4b 100644
--- a/modules/reitit-spec/project.clj
+++ b/modules/reitit-spec/project.clj
@@ -1,4 +1,4 @@
-(defproject metosin/reitit-spec "0.3.10"
+(defproject metosin/reitit-spec "0.4.2"
   :description "Reitit: clojure.spec coercion"
   :url "https://github.com/metosin/reitit"
   :license {:name "Eclipse Public License"
diff --git a/modules/reitit-swagger-ui/project.clj b/modules/reitit-swagger-ui/project.clj
index 5cbe7d23..40687417 100644
--- a/modules/reitit-swagger-ui/project.clj
+++ b/modules/reitit-swagger-ui/project.clj
@@ -1,4 +1,4 @@
-(defproject metosin/reitit-swagger-ui "0.3.10"
+(defproject metosin/reitit-swagger-ui "0.4.2"
   :description "Reitit: Swagger-ui support"
   :url "https://github.com/metosin/reitit"
   :license {:name "Eclipse Public License"
diff --git a/modules/reitit-swagger/project.clj b/modules/reitit-swagger/project.clj
index 73a66dce..d18c0082 100644
--- a/modules/reitit-swagger/project.clj
+++ b/modules/reitit-swagger/project.clj
@@ -1,4 +1,4 @@
-(defproject metosin/reitit-swagger "0.3.10"
+(defproject metosin/reitit-swagger "0.4.2"
   :description "Reitit: Swagger-support"
   :url "https://github.com/metosin/reitit"
   :license {:name "Eclipse Public License"
diff --git a/modules/reitit/project.clj b/modules/reitit/project.clj
index 24a242de..bf168a0e 100644
--- a/modules/reitit/project.clj
+++ b/modules/reitit/project.clj
@@ -1,4 +1,4 @@
-(defproject metosin/reitit "0.3.10"
+(defproject metosin/reitit "0.4.2"
   :description "Snappy data-driven router for Clojure(Script)"
   :url "https://github.com/metosin/reitit"
   :license {:name "Eclipse Public License"
@@ -12,6 +12,7 @@
   :dependencies [[metosin/reitit-core]
                  [metosin/reitit-dev]
                  [metosin/reitit-spec]
+                 [metosin/reitit-malli]
                  [metosin/reitit-schema]
                  [metosin/reitit-ring]
                  [metosin/reitit-middleware]
@@ -20,4 +21,7 @@
                  [metosin/reitit-swagger]
                  [metosin/reitit-swagger-ui]
                  [metosin/reitit-frontend]
-                 [metosin/reitit-sieppari]])
+                 [metosin/reitit-sieppari]
+
+                 ;; https://clojureverse.org/t/depending-on-the-right-versions-of-jackson-libraries/5111
+                 [com.fasterxml.jackson.core/jackson-core]])
diff --git a/perf-test/clj/reitit/opensensors_perf_test.clj b/perf-test/clj/reitit/opensensors_perf_test.clj
index df5eff17..886f11e3 100644
--- a/perf-test/clj/reitit/opensensors_perf_test.clj
+++ b/perf-test/clj/reitit/opensensors_perf_test.clj
@@ -10,6 +10,8 @@
             [compojure.core :refer [routes context ANY]]
             [calfpath.core :as cp]
             [calfpath.route :as cr]
+            [janus.route :as janus]
+            [janus.ring :as janus.ring]
 
             [io.pedestal.http.route.definition.table :as table]
             [io.pedestal.http.route.map-tree :as map-tree]
@@ -309,6 +311,91 @@
       (ANY "/topics/:topic" [] {:name :test/route47} handler)
       (ANY "/topics" [] {:name :test/route50} handler))))
 
+(def opensensors-janus-routes
+  (janus/router
+   ['root
+    {:v1 ["v1" handler
+          [[:public ["public" handler
+                     [[:topics ["topics" handler {:test/route4 [true handler]}]]
+                      [:users ["users" handler {:test/route16 [true handler]}]]
+                      [:orgs ["orgs" handler {:test/route18 [true handler]}]]]]]
+           [:users ["users" handler
+                    {:test/route36 [true handler
+                                    [[:orgs ["orgs" handler {:test/route5 [true handler]}]]
+                                     [:test/route7 ["invitations" handler]]
+                                     [:test/route9 ["topics" handler]]
+                                     [:bookmarks ["bookmarks" handler {:test/route10 ["followers" handler]}]]
+                                     [:test/route15 ["devices" handler
+                                                     [[:test/route35 [true handler]]
+                                                      [:client-id [true handler
+                                                                   {:test/route49 ["reset-password" handler]}]]]]]
+                                     [:test/route22 ["device-errors" handler]]
+                                     [:test/route24 ["usage-stats" handler]]
+                                     [:claim-device ["claim-device" handler {:test/route26 [true handler]}]]
+                                     [:test/route31 ["owned-orgs" handler]]
+                                     [:bookmark ["bookmark" handler {:test/route33 [true handler]}]]
+                                     [:test/route52 ["orgs" handler]]
+                                     [:test/route43 ["api-key" handler]]
+                                     [:test/route56 ["bookmarks" handler]]]]}]]
+           [:search ["search" handler
+                     {:topics ["topics" handler {:test/route6 [true handler]}]}]]
+           [:test/route55 ["orgs" handler
+                           [[:test/route42 [true handler
+                                            [[:test/route37 ["devices" handler
+                                                             [[:test/route13 [true handler]]]]]
+                                             [:test/route12 ["usage-stats" handler]]
+                                             [:test/route19 ["invitations" handler]]
+                                             [:test/route38 ["members" handler
+                                                             [[:test/route34 [true handler]]]]]
+                                             [:test/route17 ["errors" handler]]
+                                             [:confirm-membership ["confirm-membership" handler
+                                                                   {:test/route46 [true handler]}]]
+                                             [:test/route57 ["topics" handler]]]]]]]]
+           [:messages ["messages" handler
+                       [[:user ["user" handler {:test/route14 [true handler]}]]
+                        [:device ["device" handler {:test/route30 [true handler]}]]
+                        [:topic ["topic" handler {:test/route48 [true handler]}]]]]]
+           [:test/route54 ["topics" handler
+                           [[:test/route32 [true handler]]]]]
+           [:test/route41 ["whoami" handler]]
+           [:test/route51 ["login" handler]]]]
+     :v2 ["v2" handler
+          [[:test/route1 ["whoami" handler]]
+           [:users ["users" handler
+                    {:test/route45 [true handler
+                                    [[:test/route2 ["datasets" handler]]
+                                     [:test/route25 ["devices" handler]]
+                                     [:test/route54 ["topics" handler
+                                                     [[:test/route29 ["bulk" handler]]]]]]]}]]
+           [:public ["public" handler
+                     [[:projects ["projects" handler
+                                  {:test/route27 [true handler
+                                                  [[:test/route3 ["datasets" handler]]]]}]]
+                      [:datasets ["datasets" handler
+                                  {:test/route28 [true handler]}]]
+                      [:messages ["messages" handler
+                                  {:dataset ["dataset" handler
+                                             {:test/route53 [true handler]}]}]]]]]
+           [:datasets ["datasets" handler
+                       {:test/route11 [true handler]}]]
+           [:test/route23 ["login" handler]]
+           [:orgs ["orgs" handler
+                   {:org-id [true handler
+                             {:test/route40 ["topics" handler]}]}]]
+           [:test/route44 ["schemas" handler]]
+           [:topics ["topics" handler
+                     {:test/route47 [true handler]}]]
+           [:test/route50 ["topics" handler]]]]}]))
+
+(comment
+  (janus/identify opensensors-janus-routes "/v2/public/messages/dataset/987")
+  (-> opensensors-janus-routes
+      (janus/identify "/v2/public/messages/dataset/987")
+      (janus/dispatch* "/v2/public/messages/dataset/987"))
+  ((-> (janus.ring/make-dispatcher)
+       (janus.ring/wrap-identify opensensors-janus-routes))
+   {:uri "/v2/public/messages/dataset/987"}))
+
 (def opensensors-pedestal-routes
   (map-tree/router
     (table/table-routes
@@ -562,6 +649,7 @@
         ataraxy-f (partial ataraxy/matches opensensors-ataraxy-routes)
         compojure-f opensensors-compojure-routes
         pedestal-f (partial pedestal/find-route opensensors-pedestal-routes)
+        janus-f (-> (janus.ring/make-dispatcher) (janus.ring/wrap-identify opensensors-janus-routes))
         b! (partial bench!! routes (fn [path] {:request-method :get, :uri path, :path-info path}) true)]
 
     ;;  2538ns
@@ -621,7 +709,10 @@
     (b! "bidi" bidi-f)
 
     ;; 19688ns
-    (b! "ataraxy" ataraxy-f)))
+    (b! "ataraxy" ataraxy-f)
+
+    ;; 7550ns
+    (b! "janus" janus-f)))
 
 (comment
   (bench-rest!))
diff --git a/project.clj b/project.clj
index 1dbc7aa2..04549292 100644
--- a/project.clj
+++ b/project.clj
@@ -1,4 +1,4 @@
-(defproject metosin/reitit-parent "0.3.10"
+(defproject metosin/reitit-parent "0.4.2"
   :description "Snappy data-driven router for Clojure(Script)"
   :url "https://github.com/metosin/reitit"
   :license {:name "Eclipse Public License"
@@ -12,29 +12,32 @@
         :url "https://github.com/metosin/reitit"}
   ;; TODO: need to verify that the code actually worked with Java1.8, see #242
   :javac-options ["-Xlint:unchecked" "-target" "1.8" "-source" "1.8"]
-  :managed-dependencies [[metosin/reitit "0.3.10"]
-                         [metosin/reitit-core "0.3.10"]
-                         [metosin/reitit-dev "0.3.10"]
-                         [metosin/reitit-spec "0.3.10"]
-                         [metosin/reitit-malli "0.3.10"]
-                         [metosin/reitit-schema "0.3.10"]
-                         [metosin/reitit-ring "0.3.10"]
-                         [metosin/reitit-middleware "0.3.10"]
-                         [metosin/reitit-http "0.3.10"]
-                         [metosin/reitit-interceptors "0.3.10"]
-                         [metosin/reitit-swagger "0.3.10"]
-                         [metosin/reitit-swagger-ui "0.3.10"]
-                         [metosin/reitit-frontend "0.3.10"]
-                         [metosin/reitit-sieppari "0.3.10"]
-                         [metosin/reitit-pedestal "0.3.10"]
+  :managed-dependencies [[metosin/reitit "0.4.2"]
+                         [metosin/reitit-core "0.4.2"]
+                         [metosin/reitit-dev "0.4.2"]
+                         [metosin/reitit-spec "0.4.2"]
+                         [metosin/reitit-malli "0.4.2"]
+                         [metosin/reitit-schema "0.4.2"]
+                         [metosin/reitit-ring "0.4.2"]
+                         [metosin/reitit-middleware "0.4.2"]
+                         [metosin/reitit-http "0.4.2"]
+                         [metosin/reitit-interceptors "0.4.2"]
+                         [metosin/reitit-swagger "0.4.2"]
+                         [metosin/reitit-swagger-ui "0.4.2"]
+                         [metosin/reitit-frontend "0.4.2"]
+                         [metosin/reitit-sieppari "0.4.2"]
+                         [metosin/reitit-pedestal "0.4.2"]
                          [metosin/ring-swagger-ui "3.24.3"]
                          [metosin/spec-tools "0.10.0"]
                          [metosin/schema-tools "0.12.1"]
                          [metosin/muuntaja "0.6.6"]
                          [metosin/jsonista "0.2.5"]
-                         [metosin/sieppari "0.0.0-alpha7"]
+                         [metosin/sieppari "0.0.0-alpha8"]
                          [metosin/malli "0.0.1-20200108.194558-11"]
 
+                         ;; https://clojureverse.org/t/depending-on-the-right-versions-of-jackson-libraries/5111
+                         [com.fasterxml.jackson.core/jackson-core "2.10.0"]
+
                          [meta-merge "1.0.0"]
                          [fipp "0.6.22" :exclusions [org.clojure/core.rrb-vector]]
                          [expound "0.8.4"]
@@ -130,7 +133,8 @@
                                    [aleph "0.4.6"]
                                    [ring/ring-defaults "0.3.2"]
                                    [ataraxy "0.4.2"]
-                                   [bidi "2.1.6"]]}
+                                   [bidi "2.1.6"]
+                                   [janus "1.3.0"]]}
              :analyze {:jvm-opts ^:replace ["-server"
                                             "-Dclojure.compiler.direct-linking=true"
                                             "-XX:+PrintCompilation"