diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 99aa73328..60cc070c6 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -10,6 +10,7 @@ jobs:
         java:
           - 11
           - 17
+          - 21-ea
     steps:
       - uses: actions/checkout@v2
       - uses: actions/setup-java@v1