diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 167d2ae..8fcea57 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -30,7 +30,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        ruby: ["2.7", "3.0", "3.1", "3.2", "ruby-head", "truffleruby-head", "jruby-9.4", "jruby-head"]
+        ruby: ["2.7", "3.0", "3.1", "3.2", '3.3', "ruby-head", "truffleruby-head", "jruby-9.4", "jruby-head"]
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3