diff --git a/metadata/de.dennisguse.opentracks.yml b/metadata/de.dennisguse.opentracks.yml
index c0cf207c10..d2cd9d332a 100644
--- a/metadata/de.dennisguse.opentracks.yml
+++ b/metadata/de.dennisguse.opentracks.yml
@@ -414,7 +414,17 @@ Builds:
     gradle:
       - yes
 
+  - versionName: v3.21.0
+    versionCode: 4496
+    commit: 9f858168f89e03150ea1a158b3d0195f2d0703c3
+    sudo:
+      - apt-get update || apt-get update
+      - apt-get install -t stretch-backports openjdk-11-jdk-headless openjdk-11-jre-headless
+      - update-alternatives --auto java
+    gradle:
+      - yes
+
 AutoUpdateMode: Version %v
 UpdateCheckMode: Tags
-CurrentVersion: v3.20.2
-CurrentVersionCode: 4448
+CurrentVersion: v3.21.0
+CurrentVersionCode: 4496