diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index d031e44..ab44847 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -13,7 +13,11 @@ jobs:
     runs-on: ubuntu-latest
     
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
+    - uses: actions/setup-java@v4
+      with:
+        distribution: 'temurin'
+        java-version: '21'
     - name: Make gradlew executable
       run: chmod +x ./gradlew
     - name: Run unit tests