diff --git a/.github/workflows/gradle-build.yml b/.github/workflows/gradle-build.yml
index 453b1676..54fe6895 100644
--- a/.github/workflows/gradle-build.yml
+++ b/.github/workflows/gradle-build.yml
@@ -12,7 +12,7 @@ jobs:
       - name: Set up JDK
         uses: actions/setup-java@v1
         with:
-          java-version: 17
+          java-version: 21
       - name: Build Gradle
         uses: eskatos/gradle-command-action@v1
         with:
diff --git a/.github/workflows/gradle-check.yml b/.github/workflows/gradle-check.yml
index 90dab4e4..a5c886c7 100644
--- a/.github/workflows/gradle-check.yml
+++ b/.github/workflows/gradle-check.yml
@@ -12,7 +12,7 @@ jobs:
       - name: Set up JDK
         uses: actions/setup-java@v1
         with:
-          java-version: 17
+          java-version: 21
       - name: Build Gradle
         uses: eskatos/gradle-command-action@v1
         with:
diff --git a/.github/workflows/gradle-publish.yml b/.github/workflows/gradle-publish.yml
index affc7d7f..371a1d80 100644
--- a/.github/workflows/gradle-publish.yml
+++ b/.github/workflows/gradle-publish.yml
@@ -16,7 +16,7 @@ jobs:
       - name: Set up JDK
         uses: actions/setup-java@v1
         with:
-          java-version: 17
+          java-version: 21
       - name: Publish Maven Jar
         env:
           ACCESS_KEY: ${{ secrets.ACCESS_KEY }}