diff --git a/README.md b/README.md
index a8e7813..cc401ce 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
-# HTTP Codec v0.5.0
+# HTTP Codec v0.4.0
 
 This microservice can encode and decode HTTP messages
 
@@ -122,20 +122,16 @@ spec:
 
 # Release notes
 
-## 0.5.0
+## 0.4.0
 
++ th2 transport protocol support
++ Updated bom: `4.5.0-dev`
 + Updated common: `5.7.2-dev`
 + Updated common-utils: `2.2.2-dev`
 + Updated codec: `5.4.1-dev`
++ Updated kotlin: `1.8.22`
 + Removed sailfish-utils
 
-## 0.4.0
-
-+ th2 transport protocol support
-+ Updated bom:4.4.0
-+ Updated common:5.3.0
-+ Updated codec:5.3.0
-
 ## 0.3.0
 
 * th2-common upgrade to `3.44.0`
diff --git a/gradle.properties b/gradle.properties
index 6403218..2412c75 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -1,3 +1,3 @@
 kotlin.code.style=official
 kotlin_version=1.8.22
-release_version=0.5.0
+release_version=0.4.0