diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 4d29bea11..ee1443a65 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -31,6 +31,7 @@ jobs:
           - "3.0"
           - "3.1"
           - "3.2"
+          - "3.3"
           - ruby-head
           - jruby-9.4
         task: