diff --git a/metadata/net.gsantner.markor.yml b/metadata/net.gsantner.markor.yml
index 7e03cf1365..de4913ec69 100644
--- a/metadata/net.gsantner.markor.yml
+++ b/metadata/net.gsantner.markor.yml
@@ -800,6 +800,11 @@ Builds:
     versionCode: 149
     commit: 98c7f170851461bd7f2fe26432b5994628a90755
     subdir: app
+    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:
       - FlavorDefault