diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index a814e82..4167db6 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -31,6 +31,9 @@ jobs:
           - "3.0"
           - "3.1"
           - "3.2"
+          - "3.3"
+          - "3.4"
+          - "4.0"
     name: Ruby ${{ matrix.ruby }}
     steps:
       - uses: actions/checkout@v3