diff --git a/.github/workflows/tcr.yml b/.github/workflows/tcr.yml
index 2b4de5f..86598ee 100644
--- a/.github/workflows/tcr.yml
+++ b/.github/workflows/tcr.yml
@@ -17,6 +17,7 @@ jobs:
           - "3.0"
           - "3.1"
           - "3.2"
+          - "3.3"
     steps:
       - uses: actions/checkout@v4
       - name: Set up Ruby