diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6e5d13b5..ec81e184 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
 # Changelog
 
+## 3.5.3.dev
+* Add: [auth] htpasswd: support for Argon2 hashes
+* Improve: catch error on calendar collection upload and display problematic item on debug level
+
 ## 3.5.2
 * Adjust: [auth] ldap: use ldap_user_attr either first element of list or directly 
 * Fix: use value of property for time range filter