diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index b5cbd8c..8070e6d 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -19,6 +19,7 @@ jobs:
       fail-fast: false
       matrix:
         include:
+          - ruby: 3.1
           - ruby: 3.0
           - ruby: 2.7
           - ruby: 2.6
diff --git a/CHANGELOG.md b/CHANGELOG.md
index cda6a6b..a72a238 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,10 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 
 ## [Unreleased]
 
+### Added
+
+- Schked 1.0 support. [@bibendi]
+
 ## 0.1.1 (2021-04-05)
 
 ### Fixed
@@ -20,3 +24,4 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 - Initial release of yabeda-schked gem. [@skryukov]
 
 [@skryukov]: https://github.com/skryukov
+[@bibendi]: https://github.com/bibendi
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index b72238d..a817835 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -1,5 +1,7 @@
 # frozen_string_literal: true
 
+ENV["RACK_ENV"] = "test"
+
 require "yabeda/schked"
 
 require_relative "support/schked"
diff --git a/yabeda-schked.gemspec b/yabeda-schked.gemspec
index 553169b..036c9e8 100644
--- a/yabeda-schked.gemspec
+++ b/yabeda-schked.gemspec
@@ -31,7 +31,7 @@ Gem::Specification.new do |spec|
   spec.required_ruby_version = ">= 2.4.0"
 
   spec.add_dependency "yabeda", "~> 0.8"
-  spec.add_dependency "schked", "~> 0.3"
+  spec.add_dependency "schked", ">= 0.3", "< 2"
 
   spec.add_development_dependency "bundler", "~> 2.0"
   spec.add_development_dependency "rake", "~> 13.0"