diff --git a/.github/workflows/ruby.yml b/.github/workflows/ruby.yml
index a0ca556..f1b957b 100644
--- a/.github/workflows/ruby.yml
+++ b/.github/workflows/ruby.yml
@@ -15,7 +15,7 @@ jobs:
   test:
     strategy:
       matrix:
-        ruby-version: ['2.6', '2.7', '3.0', '3.1', '3.2']
+        ruby-version: ['2.6', '2.7', '3.0', '3.1', '3.2', '3.3']
         platform: [ubuntu-latest, macos-latest]
     runs-on: ${{ matrix.platform }}
     steps: