purecss-sass.gemspec in purecss-sass-0.6.2 vs purecss-sass.gemspec in purecss-sass-1.0.0

@@ -19,11 +19,11 @@
   spec.executables   = spec.files.grep(%r{^exe/}) { |f| File.basename(f) }
   spec.require_paths = ['lib']
 
   spec.required_ruby_version = '>= 2.0.0'
 
-  spec.add_runtime_dependency 'sass', '~> 3.3'
+  spec.add_runtime_dependency 'sass', '>= 3.4'
 
-  spec.add_development_dependency 'railties', '~> 5.0'
-  spec.add_development_dependency 'rspec', '~> 3.5'
-  spec.add_development_dependency 'sprockets-rails', '~> 3.0'
+  spec.add_development_dependency 'railties', '>= 5.0'
+  spec.add_development_dependency 'rspec', '>= 3.5'
+  spec.add_development_dependency 'sprockets-rails', '>= 3.0'
 end