diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 8841dd9b..7a31398b 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -6,7 +6,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        ruby: [ '2.7', '3.0.2', 'head' ]
+        ruby: [ '2.7', '3.0.2', '3.1', 'head' ]
         rails: [ '6.0', '6.1', '7.0', 'edge' ]
 
     env: