diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index a864d6a..f0a12b8 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -10,7 +10,7 @@ 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", head]
         rails: ["6.1.0", "7.0.0", "7.1.0", "7.2.0", "8.0.0"]
     env:
       RAILS_VERSION: ${{ matrix.rails }}