diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 7ab8e78..8948249 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -8,7 +8,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        ruby: [2.5, 2.6]
+        ruby: [2.5, 2.6, 2.7]
     runs-on: ubuntu-latest
     steps:
     - name: Checkout repository