diff --git a/.github/workflows/gradle.yml b/.github/workflows/gradle.yml
index 20a209f..b07e553 100644
--- a/.github/workflows/gradle.yml
+++ b/.github/workflows/gradle.yml
@@ -6,33 +6,21 @@ on:
   pull_request:
     branches: [ "latest" ]
 
-env:
-  GRADLE_CACHE_KEY: ${{ github.run_id }}-gradle-${{ github.run_number }}-${{ github.run_number }}-${{ github.sha }}
-
-permissions:
-  contents: read
-
 jobs:
   build:
     runs-on: ubuntu-latest
-    name: Build & Test
+    strategy:
+      matrix:
+        java: [ '17', '21' ]
+    name: Test
     steps:
-      - uses: actions/checkout@v3
-
-      - name: Set up JDK 17
-        uses: actions/setup-java@v3
+      - uses: actions/checkout@v4
+      - name: Set up JDK ${{ matrix.java }}
+        uses: actions/setup-java@v4
         with:
-          java-version: '17'
+          java-version: ${{ matrix.java }}
           distribution: 'temurin'
-
-      - name: Gradle cache
-        uses: actions/cache@v3
-        with:
-          path: ~/.gradle/caches
-          key: ${{ env.GRADLE_CACHE_KEY }}
-          restore-keys: ${{ env.GRADLE_CACHE_KEY }}
-
       - name: Run tests
-        uses: gradle/gradle-build-action@bd5760595778326ba7f1441bcf7e88b49de61a25 # v2.6.0
+        uses: gradle/actions/setup-gradle@v3
         with:
           arguments: test