diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4bf566ba..f18bdefa 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -12,11 +12,23 @@ We use [Break Versioning][breakver]. The version numbers follow a `<major>.<mino
 
 [breakver]: https://github.com/ptaoussanis/encore/blob/master/BREAK-VERSIONING.md
 
-## 0.4.1
+## 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)
 
 * bundle `reitit-malli` into `reitit` module.
 
-## 0.4.0
+## 0.4.0 (2020-01-14)
 
 * Updated deps:
 
diff --git a/modules/reitit/project.clj b/modules/reitit/project.clj
index af991cc5..ae0b5f42 100644
--- a/modules/reitit/project.clj
+++ b/modules/reitit/project.clj
@@ -21,4 +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/project.clj b/project.clj
index 705b7814..a29b3bad 100644
--- a/project.clj
+++ b/project.clj
@@ -35,6 +35,9 @@
                          [metosin/sieppari "0.0.0-alpha7"]
                          [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"]