diff --git a/google-api-client.gemspec b/google-api-client.gemspec
index 5bbe6be4d..37a83fdaf 100644
--- a/google-api-client.gemspec
+++ b/google-api-client.gemspec
@@ -15,16 +15,16 @@ Gem::Specification.new do |spec|
   spec.files         = `git ls-files -z`.split("\x0")
   spec.executables   = spec.files.grep(%r{^bin/}) { |f| File.basename(f) }
   spec.test_files    = spec.files.grep(%r{^(test|spec|features)/})
-  spec.require_paths = ['lib', 'generated']
+  spec.require_paths = ['lib', 'generated', 'third_party']
 
-  spec.add_runtime_dependency 'representable', '~> 2.1'
+  spec.add_runtime_dependency 'representable', '~> 2.3.0'
   spec.add_runtime_dependency 'multi_json', '~> 1.11'
   spec.add_runtime_dependency 'retriable', '~> 2.0'
   spec.add_runtime_dependency 'activesupport', '>= 3.2'
   spec.add_runtime_dependency 'addressable', '~> 2.3'
   spec.add_runtime_dependency 'mime-types', '>= 1.6'
   spec.add_runtime_dependency 'hurley', '~> 0.1'
-  spec.add_runtime_dependency 'googleauth', '~> 0.4'
+  spec.add_runtime_dependency 'googleauth', '~> 0.5'
   spec.add_runtime_dependency 'thor', '~> 0.19'
   spec.add_runtime_dependency 'memoist', '~> 0.11'
 end