diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 21e4070..4f46864 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -8,6 +8,7 @@ jobs:
       matrix:
         ruby:
           - 'head'
+          - '3.3'
           - '3.2'
           - '3.1'
           - '3.0'