diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 88dbe43..0c2f5c3 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -8,7 +8,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        ruby: [ '3.1', '3.2', '3.3' ]
+        ruby: [ '3.1', '3.2', '3.3', '3.4' ]
     steps:
       - uses: actions/checkout@v4
       - name: Set up Ruby ${{ matrix.ruby }}