diff --git a/.github/workflows/ruby.yml b/.github/workflows/ruby.yml
index 2738f0c..e10c7ee 100644
--- a/.github/workflows/ruby.yml
+++ b/.github/workflows/ruby.yml
@@ -15,7 +15,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        ruby-version: ['3.1', '3.2', '3.3', 'jruby-head']
+        ruby-version: ['3.1', '3.2', '3.3', '3.4', 'jruby-head']
 
     steps:
     - uses: actions/checkout@v2