diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index a3f8360..4892602 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -12,7 +12,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-latest]
-        ruby: [2.6, 2.7, "3.0", 3.1]
+        ruby: [3.0, 3.1, 3.2, 3.3]
     runs-on: ${{ matrix.os }}
     steps:
       - uses: actions/checkout@v2