diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7535644e..974dcabc 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,9 @@
 
 ## Unreleased
 
+
+## 0.4.0
+
 ### New features
 
 * Try to detect pull request id automatically, if `PULL_REQUEST_ID` is not specified. Inspired by @willnet/prid.
diff --git a/lib/pronto/version.rb b/lib/pronto/version.rb
index 0b96b973..e846282a 100644
--- a/lib/pronto/version.rb
+++ b/lib/pronto/version.rb
@@ -1,3 +1,3 @@
 module Pronto
-  VERSION = '0.3.3'
+  VERSION = '0.4.0'
 end