diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 705623f..a55b261 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -5,7 +5,7 @@ jobs:
   test-clj:
     strategy:
       matrix:
-        java: ['8', '11', '17']
+        java: ['8', '11', '17', '21']
 
     runs-on: ubuntu-latest
     steps: