diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index 03fc90a..30d1290 100644
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -15,6 +15,7 @@ jobs:
         # Due to https://github.com/actions/runner/issues/849, we have to use quotes for '3.0'
         ruby:
           - head
+          - '3.3'
           - '3.2'
           - '3.1'
           - '3.0'