diff --git a/ChangeLog.md b/ChangeLog.md
index 6fb8d050..c3c4ed23 100644
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -3,6 +3,8 @@ XP Compiler ChangeLog
 
 ## ?.?.? / ????-??-??
 
+## 0.4.0 / 2017-10-15
+
 * Optimized runtime performance by including annotations as 
   metadata inside code, see issue #1.
   (@thekid)