diff --git a/.github/workflows/gradle-build.yml b/.github/workflows/gradle-build.yml
index fc7c386..a77a04f 100644
--- a/.github/workflows/gradle-build.yml
+++ b/.github/workflows/gradle-build.yml
@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        java: [ '8', '11', '17' ]
+        java: [ '17', '21' ]
 
     steps:
     - uses: actions/checkout@v2