diff --git a/.github/workflows/ruby.yml b/.github/workflows/ruby.yml
index 7e17389..056a003 100644
--- a/.github/workflows/ruby.yml
+++ b/.github/workflows/ruby.yml
@@ -17,7 +17,12 @@ jobs:
 
     strategy:
       matrix:
-        ruby: [2.7, "3.0", 3.1, 3.2]
+        ruby:
+          - 3.1
+          - 3.2
+          - 3.3
+          - 3.4
+          - head
 
     steps:
     - uses: actions/checkout@v2