diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index f3b8591..ac24c6d 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -12,7 +12,7 @@ jobs:
 
       matrix:
         os: [ubuntu]
-        ruby: [2.4, 2.5, 2.6, 2.7]
+        ruby: [2.4, 2.5, 2.6, 2.7, '3.0', 3.1]
 
     runs-on: ${{ matrix.os }}-latest