diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 5f4c1d4..736b10d 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -14,7 +14,8 @@ jobs:
     strategy:
       matrix:
         ruby:
-          - '3.1.2'
+          - '3.1'
+          - 'head'
 
     steps:
       - uses: actions/checkout@v4