diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 6446cb70..0dcbaa1c 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -12,7 +12,7 @@ jobs:
   build:
     strategy:
       matrix:
-        java: ['17', '20' ]
+        java: ['17', '21' ]
     runs-on: 'ubuntu-latest'
     steps:
     - uses: actions/checkout@v4