diff --git a/.github/workflows/ruby.yml b/.github/workflows/ruby.yml
index a83a042..fbadd69 100644
--- a/.github/workflows/ruby.yml
+++ b/.github/workflows/ruby.yml
@@ -39,7 +39,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        ruby_version: [2.4, 2.5, 2.6, 2.7, 3.0]
+        ruby_version: [2.5, 2.6, 2.7, 3.0]
     steps:
     - uses: actions/checkout@v1
     - name: Set up Ruby ${{ matrix.ruby_version }}