diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 89ada60..12eb31b 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -6,7 +6,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        ruby: [2.6, 2.7, '3.0', 3.1, 3.2]
+        ruby: [2.6, 2.7, '3.0', 3.1, 3.2, 3.3]
     steps:
     - uses: actions/checkout@v4
     - name: Set up Ruby