diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 888bb57..8e79294 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -7,7 +7,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        ruby: ['2.5', '2.6', '2.7', '3.0', '3.1', '3.2', '3.3']
+        ruby: ['2.5', '2.6', '2.7', '3.0', '3.1', '3.2', '3.3', '3.4']
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v4