diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index cc75e03..e589480 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -30,6 +30,7 @@ jobs:
           - 2.6
           - 2.7
           - 3.0
+          - 3.1
           - ruby-head
           - jruby
     steps: