diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 99ee78d..99687e0 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -14,6 +14,7 @@ jobs:
       fail-fast: false
       matrix:
         ruby:
+          - 3.1
           - 3.0
           - 2.7
         gemfile:
diff --git a/.ruby-version b/.ruby-version
index 9f55b2c..8c50098 100644
--- a/.ruby-version
+++ b/.ruby-version
@@ -1 +1 @@
-3.0
+3.1