diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index db586d1..73d0ecc 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -10,7 +10,7 @@ jobs:
       fail-fast: false
       matrix:
         os: ["ubuntu-latest"]
-        ruby: ["3.2", "3.1", "3.0", "2.7", "2.6"]
+        ruby: ["3.3", "3.2", "3.1", "3.0", "2.7", "2.6"]
     runs-on: ubuntu-latest
     steps:
       - name: Check out code