diff --git a/.github/workflows/ruby.yml b/.github/workflows/ruby.yml
index 629acf7..f7f1c42 100644
--- a/.github/workflows/ruby.yml
+++ b/.github/workflows/ruby.yml
@@ -13,7 +13,7 @@ jobs:
     continue-on-error: ${{ matrix.ruby-version == 'head' }}
     strategy:
       matrix:
-        ruby-version: ['3.1', '3.2', '3.3', 'head']
+        ruby-version: ['3.1', '3.2', '3.3', '3.4', 'head']
 
     steps:
     - uses: actions/checkout@v2