diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 04482d0..d9e4bb0 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -31,6 +31,7 @@ jobs:
           - "3.0"
           - "3.1"
           - "3.2"
+          - "3.3"
           - ruby-head
         allow_failure: [true]
         include: