diff --git a/.github/workflows/gradle.yml b/.github/workflows/gradle.yml
index 2d1c9a1..cccc879 100644
--- a/.github/workflows/gradle.yml
+++ b/.github/workflows/gradle.yml
@@ -13,7 +13,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        java: [ 17, 20 ]
+        java: [ 17, 21 ]
 
     steps:
       - uses: actions/checkout@v4