diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index cb125c7..7358edd 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -7,10 +7,10 @@ jobs:
       matrix:
         os: [ubuntu-latest, macos-latest]
         # Due to https://github.com/actions/runner/issues/849, we have to use quotes for '3.0'
-        ruby: [2.7, '3.0', head]
+        ruby: ['3.0', head]
     runs-on: ${{ matrix.os }}
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
     - uses: ruby/setup-ruby@v1
       with:
         ruby-version: ${{ matrix.ruby }}