diff --git a/.github/workflows/genJar.yml b/.github/workflows/genJar.yml
index 851f5241..6bb83854 100644
--- a/.github/workflows/genJar.yml
+++ b/.github/workflows/genJar.yml
@@ -9,10 +9,10 @@ jobs:
     
     steps:
     - uses: actions/checkout@v2
-    - name: set up JDK 11
+    - name: set up JDK 21
       uses: actions/setup-java@v2
       with:
-        java-version: '11'
+        java-version: '21'
         distribution: 'adopt'
         cache: gradle