diff --git a/CHANGES.md b/CHANGES.md
index 87c78c057b6..e9e3f3d59e0 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,7 +1,7 @@
 CKEditor 4 Changelog
 ====================
 
-## CKEditor 4.21.0
+## CKEditor 4.21.0 [IN DEVELOPMENT]
 
 API changes: