diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 71f1627d7..639848670 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -15,6 +15,7 @@ jobs:
           - "3.0"
           - "3.1"
           - "3.2"
+          - "3.3"
         include:
           - { ruby: jruby, experimental: true }
           - { ruby: jruby-head, experimental: true }