diff --git a/.github/workflows/ruby.yml b/.github/workflows/ruby.yml
index 3ab4db9..ffe595d 100644
--- a/.github/workflows/ruby.yml
+++ b/.github/workflows/ruby.yml
@@ -18,7 +18,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        ruby: [ '3.2', '3.1', '3.0', '2.7' ]
+        ruby: [ '3.3', '3.2', '3.1', '3.0', '2.7' ]
         os: [ubuntu-latest, macos-latest, windows-latest]
         exclude:
         - os: windows-latest