diff --git a/.github/workflows/hideout-core-pull-request-merge-check.yml b/.github/workflows/hideout-core-pull-request-merge-check.yml
index 9b58425a..921ab8d7 100644
--- a/.github/workflows/hideout-core-pull-request-merge-check.yml
+++ b/.github/workflows/hideout-core-pull-request-merge-check.yml
@@ -84,6 +84,12 @@ jobs:
         with:
           token: ${{ secrets.PAT }}
 
+      - name: Set up JDK 21
+        uses: actions/setup-java@v4
+        with:
+          java-version: '21'
+          distribution: 'temurin'
+
       - name: Setup Gradle
         uses: gradle/actions/setup-gradle@v4
         with: