diff --git a/CHANGELOG.md b/CHANGELOG.md
index a3bfd0f..c55c7d9 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+## v0.5.1 (2016-10-08)
+
+* Updated `circe` to version 0.5.3
+
 ## v0.5.0 (2016-09-01)
 
 * Updated `circe` to version 0.5.0
diff --git a/README.md b/README.md
index d48f648..b973209 100644
--- a/README.md
+++ b/README.md
@@ -5,7 +5,7 @@
 SBT Configuration:
 
 ```scala
-libraryDependencies += "org.sangria-graphql" %% "sangria-circe" % "0.5.0"
+libraryDependencies += "org.sangria-graphql" %% "sangria-circe" % "0.5.1"
 ```
 
 ## License
diff --git a/build.sbt b/build.sbt
index 70635b0..21e34e7 100644
--- a/build.sbt
+++ b/build.sbt
@@ -1,6 +1,6 @@
 name := "sangria-circe"
 organization := "org.sangria-graphql"
-version := "0.5.1-SNAPSHOT"
+version := "0.5.1"
 
 description := "Sangria circe marshalling"
 homepage := Some(url("http://sangria-graphql.org"))
@@ -9,7 +9,7 @@ licenses := Seq("Apache License, ASL Version 2.0" -> url("http://www.apache.org/
 scalaVersion := "2.11.8"
 scalacOptions ++= Seq("-deprecation", "-feature")
 
-val circeVersion = "0.5.0"
+val circeVersion = "0.5.3"
 
 libraryDependencies ++= Seq(
   "org.sangria-graphql" %% "sangria-marshalling-api" % "0.2.1",