diff --git a/.github/workflows/gradle.yml b/.github/workflows/gradle.yml
index 7dcc6c4..643851a 100644
--- a/.github/workflows/gradle.yml
+++ b/.github/workflows/gradle.yml
@@ -9,7 +9,7 @@ jobs:
 
     strategy:
       matrix:
-        java: [ '11', '17', '20' ]
+        java: [ '11', '17', '21' ]
 
     steps:
     - uses: actions/checkout@v4