diff --git a/.github/workflows/commit_ci.yml b/.github/workflows/commit_ci.yml
index bc6244d..c2334bb 100644
--- a/.github/workflows/commit_ci.yml
+++ b/.github/workflows/commit_ci.yml
@@ -39,10 +39,10 @@ jobs:
         uses: jwlawson/actions-setup-cmake@v1
         with:
           cmake-version: '3.22.1'
-      - name: Prepare Java 17
+      - name: Prepare Java 21
         uses: actions/setup-java@v4
         with:
-          java-version: 17
+          java-version: 21
           java-package: jdk
           distribution: 'temurin'
           cache: 'gradle'
diff --git a/.github/workflows/pull_request_ci.yml b/.github/workflows/pull_request_ci.yml
index 05f4cee..50e5cd8 100644
--- a/.github/workflows/pull_request_ci.yml
+++ b/.github/workflows/pull_request_ci.yml
@@ -28,10 +28,10 @@ jobs:
         uses: jwlawson/actions-setup-cmake@v1
         with:
           cmake-version: '3.22.1'
-      - name: Prepare Java 17
+      - name: Prepare Java 21
         uses: actions/setup-java@v4
         with:
-          java-version: 17
+          java-version: 21
           java-package: jdk
           distribution: 'temurin'
           cache: 'gradle'