diff --git a/.github/workflows/mainbuild.yml b/.github/workflows/mainbuild.yml
index 25a8c8f..e28ede0 100644
--- a/.github/workflows/mainbuild.yml
+++ b/.github/workflows/mainbuild.yml
@@ -15,11 +15,11 @@ jobs:
     steps:
       - name: checkout repository
         uses: actions/checkout@v3
-      - name: setup jdk 17
+      - name: setup jdk 21
         uses: actions/setup-java@v3
         with:
           distribution: "adopt"
-          java-version: 17
+          java-version: 21
       - name: Cache Gradle packages
         uses: actions/cache@v3
         with:
diff --git a/.github/workflows/prbuild.yml b/.github/workflows/prbuild.yml
index e03b160..25934c0 100644
--- a/.github/workflows/prbuild.yml
+++ b/.github/workflows/prbuild.yml
@@ -8,11 +8,11 @@ jobs:
     steps:
       - name: checkout repository
         uses: actions/checkout@v3
-      - name: setup jdk 17
+      - name: setup jdk 21
         uses: actions/setup-java@v3
         with:
           distribution: "adopt"
-          java-version: 17
+          java-version: 21
       - name: Cache Gradle packages
         uses: actions/cache@v3
         with:
diff --git a/.github/workflows/publish.yml b/.github/workflows/publish.yml
index 67ab623..7a24831 100644
--- a/.github/workflows/publish.yml
+++ b/.github/workflows/publish.yml
@@ -12,11 +12,11 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
-      - name: Set up JDK 17
+      - name: Set up JDK 21
         uses: actions/setup-java@v2
         with:
           distribution: "adopt"
-          java-version: 17
+          java-version: 21
           cache: "gradle"
       - name: Grant execute permission to gradlew
         run: chmod +x gradlew