diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index fdb4675..f635551 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -28,7 +28,7 @@ jobs:
       - uses: actions/setup-java@v4
         with:
           distribution: 'zulu'
-          java-version: '22'
+          java-version: '21'
       - uses: gradle/actions/setup-gradle@v3
         with:
           gradle-home-cache-cleanup: true
@@ -45,7 +45,7 @@ jobs:
       - uses: actions/setup-java@v4
         with:
           distribution: 'zulu'
-          java-version: '22'
+          java-version: '21'
       - uses: gradle/actions/setup-gradle@v3
         with:
           gradle-home-cache-cleanup: true
@@ -67,7 +67,7 @@ jobs:
       - uses: actions/setup-java@v4
         with:
           distribution: 'zulu'
-          java-version: '22'
+          java-version: '21'
       - uses: gradle/actions/setup-gradle@v3
         with:
           gradle-home-cache-cleanup: true
diff --git a/.github/workflows/deploy-website.yml b/.github/workflows/deploy-website.yml
index 585fd2e..d60fcef 100644
--- a/.github/workflows/deploy-website.yml
+++ b/.github/workflows/deploy-website.yml
@@ -24,7 +24,7 @@ jobs:
       - uses: actions/setup-java@v4
         with:
           distribution: 'zulu'
-          java-version: '22'
+          java-version: '21'
       - uses: gradle/actions/setup-gradle@v3
         with:
           gradle-home-cache-cleanup: true