diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index d7bb45c..70ded54 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -99,7 +99,7 @@ jobs:
       - name: Install Ruby and gems
         uses: ruby/setup-ruby@v1
         with:
-          ruby-version: "3.0"
+          ruby-version: "3.1"
           bundler-cache: true
       - name: Lint Ruby files
         run: bundle exec standardrb
diff --git a/.rubocop.yml b/.rubocop.yml
index 6faf5db..2db2740 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -1,7 +1,7 @@
 require: standard
 
 AllCops:
-  TargetRubyVersion: 3.0
+  TargetRubyVersion: 3.1
 
 inherit_gem:
   standard: config/base.yml
diff --git a/.standard.yml b/.standard.yml
index 4bd8331..6ab3913 100644
--- a/.standard.yml
+++ b/.standard.yml
@@ -1,3 +1,4 @@
 parallel: true
+ruby_version: 3.1
 ignore:
   - "spec/dummy/**/*"