diff --git a/metadata/at.bitfire.davdroid.yml b/metadata/at.bitfire.davdroid.yml
index 6d2afd8d2e..63c2eb132b 100644
--- a/metadata/at.bitfire.davdroid.yml
+++ b/metadata/at.bitfire.davdroid.yml
@@ -1646,6 +1646,10 @@ Builds:
     commit: 299fb27af4933e84879557b06af4cff87cd3720f
     subdir: app
     submodules: true
+    sudo:
+      - apt-get update
+      - apt-get install -y openjdk-17-jdk-headless
+      - update-java-alternatives -a
     gradle:
       - ose