diff --git a/.github/workflows/ci-actions.yml b/.github/workflows/ci-actions.yml
index b451e9c5..1c591ce2 100644
--- a/.github/workflows/ci-actions.yml
+++ b/.github/workflows/ci-actions.yml
@@ -20,6 +20,10 @@ jobs:
             name: "17",
             java-version: 17,
           }
+          - {
+            name: "21",
+            java-version: 21,
+          }
     steps:
       - uses: actions/checkout@v4
       - name: Set up JDK ${{ matrix.java.name }}