diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 72d07e3..cd4d7f8 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -13,17 +13,19 @@ jobs:
       fail-fast: false
       matrix:
         activesupport: ['6.1', '7.0']
+        json_schemer: ['2.0', '2.1']
         ruby: ['3.0', '3.1', '3.2']
     steps:
     - uses: actions/checkout@v3
     - name: Set up Ruby
       uses: ruby/setup-ruby@v1
       with:
-        ruby-version: ${{ matrix.ruby }}
+        ruby-version: '${{ matrix.ruby }}'
         bundler-cache: true
-        cache-version: ${{ matrix.activesupport }}
+        cache-version: ${{ matrix.activesupport }}-${{ matrix.json_schemer }}
       env:
-        ACTIVESUPPORT: ${{ matrix.activesupport }}
+        ACTIVESUPPORT: '${{ matrix.activesupport }}'
+        JSON_SCHEMER: '${{ matrix.json_schemer }}'
     - name: Rspec
       run: bundle exec rspec
 
diff --git a/Gemfile b/Gemfile
index b414614..120159f 100644
--- a/Gemfile
+++ b/Gemfile
@@ -9,3 +9,6 @@ end
 if (version = ENV['ACTIVESUPPORT'])
   gem 'activesupport', "~> #{version}.0"
 end
+if (version = ENV['JSON_SCHEMER'])
+  gem 'json_schemer', "~> #{version}.0"
+end
diff --git a/openapi_contracts.gemspec b/openapi_contracts.gemspec
index 3d3a27f..54df7db 100644
--- a/openapi_contracts.gemspec
+++ b/openapi_contracts.gemspec
@@ -14,7 +14,7 @@ Gem::Specification.new do |s|
   s.files = Dir['lib/**/*', 'README.md']
 
   s.add_dependency 'activesupport', '>= 6.1', '< 8'
-  s.add_dependency 'json_schemer', '~> 2.0.0'
+  s.add_dependency 'json_schemer', '>= 2', '< 2.2'
   s.add_dependency 'rack', '>= 2.0.0'
 
   s.add_development_dependency 'json_spec', '~> 1.1.5'