diff --git a/metadata/de.chadenas.cpudefense.yml b/metadata/de.chadenas.cpudefense.yml
index 52944843b9..e9e97e546a 100644
--- a/metadata/de.chadenas.cpudefense.yml
+++ b/metadata/de.chadenas.cpudefense.yml
@@ -84,9 +84,21 @@ Builds:
     gradle:
       - yes
 
+  - versionName: '1.21'
+    versionCode: 21
+    commit: 05f3e9d7547a9629429a6e4f9977f6667be9431d
+    subdir: app
+    sudo:
+      - export CPUS_MAX=1
+      - export CPUS=$(getconf _NPROCESSORS_ONLN)
+      - for (( c=$CPUS_MAX; c<$CPUS; c++ )) ; do echo 0 > /sys/devices/system/cpu/cpu$c/online
+        ; done
+    gradle:
+      - yes
+
 AllowedAPKSigningKeys: 16d325320ba0d80f98724000116e72d5d5d4a40ffc3236dd3180aa0a834dd8f9
 
 AutoUpdateMode: Version
 UpdateCheckMode: Tags
-CurrentVersion: '1.20'
-CurrentVersionCode: 20
+CurrentVersion: '1.21'
+CurrentVersionCode: 21