diff --git a/Gemfile b/Gemfile
index d65e2a669..ef8e2c6ce 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,3 +1,11 @@
 source 'http://rubygems.org'
 
 gemspec
+
+group :test do
+  gem "ruby-debug", "~> 0.10.4", :require => nil, :platforms => :ruby_18
+  gem "debugger",   "~> 1.1.1",  :require => nil, :platforms => :ruby_19
+  gem "shoulda"
+  gem "rake"
+  gem "mocha"
+end
diff --git a/ruby-saml.gemspec b/ruby-saml.gemspec
index bd1ab5f4b..a1d121358 100644
--- a/ruby-saml.gemspec
+++ b/ruby-saml.gemspec
@@ -25,10 +25,5 @@ Gem::Specification.new do |s|
 
   s.add_runtime_dependency("canonix", ["0.1.1"])
   s.add_runtime_dependency("uuid", ["~> 2.3"])
-
-  s.add_development_dependency("shoulda", [">= 0"])
-  s.add_development_dependency("rake", [">= 0"])
-  s.add_development_dependency("ruby-debug", [">= 0"])
-  s.add_development_dependency("mocha", [">= 0"])
 end