diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index a82094d..3d47c17 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -7,7 +7,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        ruby: ['2.5','2.6','2.7','3.1','3.2','3.3']
+        ruby: ['3.1','3.2','3.3']
     name: Test ruby v${{ matrix.ruby }} support
     steps:
     - uses: actions/checkout@v1