diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 04955f7..5382a6c 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -14,7 +14,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        ruby: ['3.0', 3.1, 3.2, 3.3]
+        ruby: ['3.0', 3.1, 3.2, 3.3, '3.4.0-preview1']
         activerecord: [6.1, '7.0', 7.1]
 
     runs-on: ubuntu-latest