appium_lib.gemspec in appium_lib-0.19.1 vs appium_lib.gemspec in appium_lib-0.21.0

@@ -22,17 +22,16 @@
   s.description += '.' # avoid identical warning
   s.authors = s.email = [ '[e-mail]' ]
   s.homepage = 'https://github.com/appium/ruby_lib' # published as appium_lib
   s.require_paths = [ 'lib' ]
 
-  s.add_runtime_dependency 'selenium-webdriver', '~> 2.39.0'
-  s.add_runtime_dependency 'awesome_print', '~> 1.2.0'
-  s.add_runtime_dependency 'json', '~> 1.8.1'
-  s.add_runtime_dependency 'toml', '~> 0.0.4'
-  s.add_runtime_dependency 'posix-spawn', '~> 0.3.8'
-  s.add_runtime_dependency 'webkit_remote', '~> 0.4.1'
+  s.add_runtime_dependency 'selenium-webdriver', '~> 2.39', '>= 2.39.0'
+  s.add_runtime_dependency 'awesome_print', '~> 1.2', '>= 1.2.0'
+  s.add_runtime_dependency 'json', '~> 1.8', '>= 1.8.1'
+  s.add_runtime_dependency 'toml', '~> 0.0', '>= 0.0.4'
+  s.add_runtime_dependency 'posix-spawn', '~> 0.3', '>= 0.3.8'
 
-  s.add_development_dependency 'rake', '~> 10.0.4'
-  s.add_development_dependency 'yard', '~> 0.8.7.3'
+  s.add_development_dependency 'rake', '~> 10.0', '>= 10.0.4'
+  s.add_development_dependency 'yard', '~> 0.8', '>= 0.8.7.3'
 
   s.files = `git ls-files`.split "\n"
 end