diff --git a/.github/workflows/build_release.yml b/.github/workflows/build_release.yml
index 10a9e66d5..7fa1b688a 100644
--- a/.github/workflows/build_release.yml
+++ b/.github/workflows/build_release.yml
@@ -104,6 +104,20 @@ jobs:
           repository: 'komikku-app/komikku-source'
           ssh-key: '${{ secrets.KOMIKKU_DEPLOY }}'
 
+      - name: Clone Submodule
+        run: |
+          mkdir -p $HOME/.ssh
+          echo '${{ secrets.ADBLOCKANDROID_DEPLOY }}' > $HOME/.ssh/ssh.key
+          chmod 600 $HOME/.ssh/ssh.key
+          export GIT_SSH_COMMAND="ssh -i $HOME/.ssh/ssh.key"
+          git submodule set-url ${{ env.SUBMODULE_PATH }} git@github.com:${{ env.REPO }}.git
+          git submodule update --init --recursive
+          git submodule set-url ${{ env.SUBMODULE_PATH }} https://github.com/${{ env.REPO }}.git
+          unset GIT_SSH_COMMAND
+        env:
+          SUBMODULE_PATH: AdblockAndroid
+          REPO: komikku-app/AdblockAndroid
+
       - name: Validate Gradle Wrapper
         uses: gradle/actions/wrapper-validation@d156388eb19639ec20ade50009f3d199ce1e2808 # v4
 
diff --git a/gradle/kotlinx.versions.toml b/gradle/kotlinx.versions.toml
index 3021b2201..1fa287020 100644
--- a/gradle/kotlinx.versions.toml
+++ b/gradle/kotlinx.versions.toml
@@ -1,5 +1,5 @@
 [versions]
-kotlin_version = "2.0.20"
+kotlin_version = "2.0.21"
 serialization_version = "1.7.3"
 xml_serialization_version = "0.86.3"