diff --git a/api/setup/setup.inc.php b/api/setup/setup.inc.php
index ec3ee80b4a..c503a247e7 100644
--- a/api/setup/setup.inc.php
+++ b/api/setup/setup.inc.php
@@ -14,7 +14,7 @@ $setup_info['api']['title']     = 'EGroupware API';
 $setup_info['api']['version']   = '21.1';
 $setup_info['api']['versions']['current_header'] = '1.29';
 // maintenance release in sync with changelog in doc/rpm-build/debian.changes
-$setup_info['api']['versions']['maintenance_release'] = '21.1.20210504';
+$setup_info['api']['versions']['maintenance_release'] = '21.1.20210521';
 $setup_info['api']['enable']    = 3;
 $setup_info['api']['app_order'] = 1;
 $setup_info['api']['license'] = 'GPL';
diff --git a/doc/rpm-build/debian.changes b/doc/rpm-build/debian.changes
index 7eb2a351b4..6ceed4cc06 100644
--- a/doc/rpm-build/debian.changes
+++ b/doc/rpm-build/debian.changes
@@ -1,3 +1,22 @@
+egroupware-docker (21.1.20210521) hardy; urgency=low
+
+  * last 21.1 release candidate incl. new login background, probably identical to release on 25th May
+  * CalDAV/Calendar: fix broken sync in last RC
+  * AD: fix account-selection type "groupmembers" caused high load on AD
+  * AD: fix login always reports "account is expired", if account-selection "group-members" is set for AD
+  * ADS/LDAP: improve caching of searching/listing
+  * Infolog: Add info_owner/... merge placeholders
+  * SmallPART: allow to interactive choose a course and video via LTI 1.3
+  * SmallPART: automatic registration from Moodle 3.10+
+  * SmallPART: using now ceLTIc/LTI for LTI 1.3 too
+  * SmallPART: automatic use SameSite=None cookie attribute when embedding via LTI
+  * SmallPART: fix failed opening of courses from course-list via LTI
+  * SmallPART: allow to configure "Moodle username" for checking or creating an EGroupware user
+  * EPL/CTI/Placetel: allow to download preconfigured Windows softphone
+  * EPL/CTI/Placetel: automatic create API token and enable notify-API
+
+ -- Ralf Becker <rb@egroupware.org>  Fri, 21 May 2021 17:54:03 +0200
+
 egroupware-docker (21.1.20210504) hardy; urgency=low
 
   * 5th and last 21.1 release candidate