diff --git a/.github/workflows/build-apk.yml b/.github/workflows/build-apk.yml
index e7fb3a9..b75fceb 100644
--- a/.github/workflows/build-apk.yml
+++ b/.github/workflows/build-apk.yml
@@ -37,8 +37,22 @@ jobs:
       - name: 🏗️ Generate Native Android Project (Expo Prebuild)
         run: npx expo prebuild --platform android --clean
 
+      - name: 🔑 Decode Keystore
+        env:
+          KEYSTORE_BASE64: ${{ secrets.KEYSTORE_BASE64 }}
+        run: echo "$KEYSTORE_BASE64" | base64 --decode > release.keystore
+
       - name: 🔨 Build APK
-        run: cd android && ./gradlew assembleRelease
+        env:
+          KEYSTORE_PASSWORD: ${{ secrets.KEYSTORE_PASSWORD }}
+          KEY_ALIAS: ${{ secrets.KEY_ALIAS }}
+          KEY_PASSWORD: ${{ secrets.KEY_PASSWORD }}
+        run: |
+          cd android && ./gradlew assembleRelease \
+            -Pandroid.injected.signing.store.file=../release.keystore \
+            -Pandroid.injected.signing.store.password="$KEYSTORE_PASSWORD" \
+            -Pandroid.injected.signing.key.alias="$KEY_ALIAS" \
+            -Pandroid.injected.signing.key.password="$KEY_PASSWORD"
 
       - name: 📂 Upload APK Artifact
         uses: actions/upload-artifact@v7