diff --git a/ChangeLog.md b/ChangeLog.md
index 9c21c49..8845089 100644
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -1,4 +1,8 @@
 # Changelog
 
+## Version 0.5.1
+* Enforce collections to always have a collection type set
+* Collection saving: add another verification for collection UID uniqueness.
+
 ## Version 0.5.0
 * First Etebase-server release (was EteSync-server before)