diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index d9537a6..bd4ed9c 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -82,7 +82,15 @@ jobs:
         uses: actions/setup-java@v4
         with:
           distribution: temurin
-          java-version: 18
+          java-version: 21
+
+      - name: Cache Gradle dependencies
+        uses: actions/cache@v3
+        with:
+          path: ~/.gradle/caches
+          key: ${{ runner.os }}-gradle-${{ hashFiles('**/*.gradle*', '**/gradle-wrapper.properties') }}
+          restore-keys: |
+            ${{ runner.os }}-gradle-
 
       # Step 9: Build the APK
       - name: Build APK