diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 08a2504..0c74078 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -18,7 +18,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        image: ["3.17", "3.19", "3.20"]
+        image: ["3.17", "3.19", "3.20", "3.21"]
         openssl_version: ["3.0.9"]
       fail-fast: false
     steps: