diff --git a/examples/http/README.md b/examples/http/README.md
index 7ab378d6..fb1b0de2 100644
--- a/examples/http/README.md
+++ b/examples/http/README.md
@@ -10,8 +10,10 @@
 Go with browser to:
 
 * http://localhost:3000/api/sync - synchronous
-* http://localhost:3000/api/async - with core.async
-* http://localhost:3000/api/future - with futures
+* http://localhost:3000/api/async - with [core.async](https://github.com/clojure/core.async) channels
+* http://localhost:3000/api/future - with [futures](https://clojuredocs.org/clojure.core/future)
+* http://localhost:3000/api/deferred - with [manifold](https://github.com/ztellman/manifold) deferred
+* http://localhost:3000/api/promesa - with [promesa](http://funcool.github.io/promesa/latest/) promises
 
 
 ## License
diff --git a/examples/http/project.clj b/examples/http/project.clj
index 4fdf5d10..52558cfd 100644
--- a/examples/http/project.clj
+++ b/examples/http/project.clj
@@ -2,6 +2,8 @@
   :description "Reitit Ring App with Swagger"
   :dependencies [[org.clojure/clojure "1.9.0"]
                  [org.clojure/core.async "0.4.474"]
+                 [funcool/promesa "1.9.0"]
+                 [manifold "0.1.8"]
                  [ring "1.6.3"]
                  [metosin/reitit "0.2.0-alpha1"]]
   :repl-options {:init-ns example.server})
diff --git a/examples/http/src/example/server.clj b/examples/http/src/example/server.clj
index f629a08b..d3ae7a3d 100644
--- a/examples/http/src/example/server.clj
+++ b/examples/http/src/example/server.clj
@@ -1,46 +1,58 @@
 (ns example.server
   (:require [reitit.http :as http]
             [reitit.ring :as ring]
-            [clojure.core.async :as a]
             [reitit.interceptor.sieppari]
-            [ring.adapter.jetty :as jetty]))
+            [ring.adapter.jetty :as jetty]
+            [clojure.core.async :as a]
+            [manifold.deferred :as d]
+            [promesa.core :as p]))
 
-(defn -interceptor [f x]
+(defn interceptor [f x]
   {:enter (fn [ctx] (f (update-in ctx [:request :via] (fnil conj []) x)))
    :leave (fn [ctx] (f (update-in ctx [:response :body] str "\n<- " x)))})
 
-(def interceptor (partial -interceptor identity))
-(def future-interceptor (partial -interceptor #(future %)))
-(def async-interceptor (partial -interceptor #(a/go %)))
+(defn handler [f]
+  (fn [{:keys [via]}]
+    (f {:status 200,
+        :body (str (apply str (map #(str "-> " % "\n") via)) "   hello!")})))
 
-(defn -handler [f {:keys [via]}]
-  (f {:status 200,
-      :body (str (apply str (map #(str "-> " % "\n") via)) "   hello!")}))
-
-(def handler (partial -handler identity))
-(def future-handler (partial -handler #(future %)))
-(def async-handler (partial -handler #(a/go %)))
+(def <sync> identity)
+(def <future> #(future %))
+(def <async> #(a/go %))
+(def <deferred> d/success-deferred)
+(def <promesa> p/promise)
 
 (def app
   (http/ring-handler
     (http/router
       ["/api"
-       {:interceptors [(interceptor :api)]}
+       {:interceptors [(interceptor <sync> :api)]}
 
        ["/sync"
-        {:interceptors [(interceptor :sync)]
-         :get {:interceptors [(interceptor :hello)]
-               :handler handler}}]
+        {:interceptors [(interceptor <sync> :sync)]
+         :get {:interceptors [(interceptor <sync> :get)]
+               :handler (handler <sync>)}}]
 
        ["/future"
-        {:interceptors [(future-interceptor :future)]
-         :get {:interceptors [(future-interceptor :hello)]
-               :handler future-handler}}]
+        {:interceptors [(interceptor <future> :future)]
+         :get {:interceptors [(interceptor <future> :get)]
+               :handler (handler <future>)}}]
 
        ["/async"
-        {:interceptors [(async-interceptor :async)]
-         :get {:interceptors [(async-interceptor :async-hello)]
-               :handler async-handler}}]])
+        {:interceptors [(interceptor <async> :async)]
+         :get {:interceptors [(interceptor <async> :get)]
+               :handler (handler <async>)}}]
+
+       ["/deferred"
+        {:interceptors [(interceptor <deferred> :deferred)]
+         :get {:interceptors [(interceptor <deferred> :get)]
+               :handler (handler <deferred>)}}]
+
+       ["/promesa"
+        {:interceptors [(interceptor <promesa> :promesa)]
+         :get {:interceptors [(interceptor <promesa> :get)]
+               :handler (handler <promesa>)}}]])
+
     (ring/create-default-handler)
     {:executor reitit.interceptor.sieppari/executor}))
 
diff --git a/project.clj b/project.clj
index b94996df..2335975f 100644
--- a/project.clj
+++ b/project.clj
@@ -27,7 +27,7 @@
                          [metosin/ring-swagger-ui "2.2.10"]
                          [metosin/muuntaja "0.6.0-alpha5"]
                          [metosin/jsonista "0.2.1"]
-                         [metosin/sieppari "0.0.0-alpha4"]]
+                         [metosin/sieppari "0.0.0-alpha5"]]
 
   :plugins [[jonase/eastwood "0.2.6"]
             [lein-doo "0.1.10"]
@@ -64,7 +64,7 @@
                                   [ikitommi/immutant-web "3.0.0-alpha1"]
                                   [metosin/muuntaja "0.6.0-alpha5"]
                                   [metosin/ring-swagger-ui "2.2.10"]
-                                  [metosin/sieppari "0.0.0-alpha4"]
+                                  [metosin/sieppari "0.0.0-alpha5"]
                                   [metosin/jsonista "0.2.1"]
 
                                   [criterium "0.4.4"]
@@ -72,6 +72,10 @@
                                   [org.clojure/tools.namespace "0.2.11"]
                                   [com.gfredericks/test.chuck "0.2.9"]
 
+                                  [org.clojure/core.async "0.4.474"]
+                                  [manifold "0.1.8"]
+                                  [funcool/promesa "1.9.0"]
+
                                   ;; https://github.com/bensu/doo/issues/180
                                   [fipp "0.6.12"]]}
              :perf {:jvm-opts ^:replace ["-server"
@@ -84,7 +88,9 @@
                                    [io.pedestal/pedestal.service "0.5.4"]
                                    [io.pedestal/pedestal.jetty "0.5.4"]
                                    [org.clojure/core.async "0.4.474"]
-                                   [metosin/sieppari "0.0.0-alpha4"]
+                                   [manifold "0.1.8"]
+                                   [funcool/promesa "1.9.0"]
+                                   [metosin/sieppari "0.0.0-alpha5"]
                                    [yada "1.2.13"]
                                    [ring/ring-defaults "0.3.2"]
                                    [ataraxy "0.4.0"]