diff --git a/.github/workflows/gradle.yml b/.github/workflows/gradle.yml
index 4fdd5e7..8f86872 100644
--- a/.github/workflows/gradle.yml
+++ b/.github/workflows/gradle.yml
@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        java-version: [ 17, 20 ]
+        java-version: [ 17, 21 ]
         os: [ubuntu-latest, macos-latest, windows-latest]
 
     steps: