diff --git a/Gemfile b/Gemfile
index 0578a7955..0cfa33569 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,6 +1,6 @@
 source :rubygems
 
-gem 'signet', '>= 0.3.1'
+gem 'signet', '>= 0.3.4'
 gem 'addressable', '>= 2.2.3'
 gem 'uuidtools', '>= 2.1.0'
 gem 'autoparse', '>= 0.3.1'
diff --git a/google-api-client.gemspec b/google-api-client.gemspec
index bd52de135..546fb1b56 100644
--- a/google-api-client.gemspec
+++ b/google-api-client.gemspec
@@ -22,7 +22,7 @@ Gem::Specification.new do |s|
     s.specification_version = 3
 
     if Gem::Version.new(Gem::VERSION) >= Gem::Version.new('1.2.0') then
-      s.add_runtime_dependency(%q<signet>, [">= 0.3.1"])
+      s.add_runtime_dependency(%q<signet>, [">= 0.3.4"])
       s.add_runtime_dependency(%q<addressable>, [">= 2.2.3"])
       s.add_runtime_dependency(%q<autoparse>, [">= 0.3.1"])
       s.add_runtime_dependency(%q<faraday>, ["~> 0.7.0"])
@@ -35,7 +35,7 @@ Gem::Specification.new do |s|
       s.add_development_dependency(%q<rspec>, ["~> 1.2.9"])
       s.add_development_dependency(%q<rcov>, [">= 0.9.9"])
     else
-      s.add_dependency(%q<signet>, [">= 0.3.1"])
+      s.add_dependency(%q<signet>, [">= 0.3.4"])
       s.add_dependency(%q<addressable>, [">= 2.2.3"])
       s.add_dependency(%q<autoparse>, [">= 0.3.1"])
       s.add_dependency(%q<faraday>, ["~> 0.7.0"])
@@ -49,7 +49,7 @@ Gem::Specification.new do |s|
       s.add_dependency(%q<rcov>, [">= 0.9.9"])
     end
   else
-    s.add_dependency(%q<signet>, [">= 0.3.1"])
+    s.add_dependency(%q<signet>, [">= 0.3.4"])
     s.add_dependency(%q<addressable>, [">= 2.2.3"])
     s.add_dependency(%q<autoparse>, [">= 0.3.1"])
     s.add_dependency(%q<faraday>, ["~> 0.7.0"])
diff --git a/tasks/gem.rake b/tasks/gem.rake
index d3e8cad4e..2f6696069 100644
--- a/tasks/gem.rake
+++ b/tasks/gem.rake
@@ -24,7 +24,7 @@ namespace :gem do
     s.rdoc_options.concat ['--main',  'README.md']
 
     # Dependencies used in the main library
-    s.add_runtime_dependency('signet', '>= 0.3.1')
+    s.add_runtime_dependency('signet', '>= 0.3.4')
     s.add_runtime_dependency('addressable', '>= 2.2.3')
     s.add_runtime_dependency('autoparse', '>= 0.3.1')
     s.add_runtime_dependency('faraday', '~> 0.7.0')