diff --git a/metadata/de.uni_potsdam.hpi.openmensa.yml b/metadata/de.uni_potsdam.hpi.openmensa.yml
index 5bce31fe90..1077ea40fe 100644
--- a/metadata/de.uni_potsdam.hpi.openmensa.yml
+++ b/metadata/de.uni_potsdam.hpi.openmensa.yml
@@ -154,6 +154,11 @@ Builds:
   - versionName: 1.1.1
     versionCode: 31
     commit: a411afa093c1942b24ccae8191a019cc4c4b9440
+    sudo:
+      - echo "deb https://deb.debian.org/debian bullseye main" > /etc/apt/sources.list.d/bullseye.list
+      - apt-get update
+      - apt-get install -y -t bullseye openjdk-11-jdk-headless
+      - update-java-alternatives --set java-1.11.0-openjdk-amd64
     gradle:
       - yes
     prebuild: echo -e "\norg.gradle.jvmargs=-Xms2048m -Xmx2048m -XX:MaxPermSize=2048m"