diff --git a/rswag-specs/open_api-rswag-specs.gemspec b/rswag-specs/open_api-rswag-specs.gemspec
index dce6f11..8368c62 100644
--- a/rswag-specs/open_api-rswag-specs.gemspec
+++ b/rswag-specs/open_api-rswag-specs.gemspec
@@ -15,9 +15,9 @@ Gem::Specification.new do |s|
 
   s.files = Dir['{lib}/**/*'] + %w[MIT-LICENSE Rakefile]
 
-  s.add_dependency 'activesupport', '>= 3.1'
+  s.add_dependency 'activesupport', '>= 3.1', '< 7.0'
   s.add_dependency 'json-schema', '~> 2.2'
-  s.add_dependency 'railties', '>= 3.1'
+  s.add_dependency 'railties', '>= 3.1', '< 7.0'
   s.add_dependency 'hashie'
   s.add_development_dependency 'guard-rspec'
 end