added release date to changelog
diff --git a/CHANGELOG.md b/CHANGELOG.md
index df6bf02..6b5d3a7 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,7 +3,7 @@
 The [git commit history](https://github.com/takari/maven-wrapper/commits/master) is the detailed source of all changes.
 The following provides most information at an easier glance.
 
-## Version 0.4.0 - upcoming
+## Version 0.4.0 - 2018-02-19
 
 - Allow for wrapper to work without the jar file
   - see https://github.com/takari/maven-wrapper/pull/60