diff --git a/metadata/at.bitfire.davdroid.yml b/metadata/at.bitfire.davdroid.yml
index 3da44fccc1..5283cdf6b3 100644
--- a/metadata/at.bitfire.davdroid.yml
+++ b/metadata/at.bitfire.davdroid.yml
@@ -2072,7 +2072,20 @@ Builds:
       - ose
     prebuild: sed -i -e 's/configuration-cache=.*/configuration-cache=false/' ../gradle.properties
 
+  - versionName: 4.5.2.1-ose
+    versionCode: 405020100
+    commit: 94a85833bc9180912dd2dd652cdde96441358b5d
+    subdir: app
+    sudo:
+      - echo "deb http://deb.debian.org/debian trixie main" > /etc/apt/sources.list.d/trixie.list
+      - apt-get update
+      - apt-get install -y openjdk-21-jdk-headless
+      - update-java-alternatives -a
+    gradle:
+      - ose
+    prebuild: sed -i -e 's/configuration-cache=.*/configuration-cache=false/' ../gradle.properties
+
 AutoUpdateMode: Version
 UpdateCheckMode: Tags ^v[0-9.]+-ose[0-9]*$
-CurrentVersion: 4.5.1-ose
-CurrentVersionCode: 405010003
+CurrentVersion: 4.5.2.1-ose
+CurrentVersionCode: 405020100