diff --git a/Gemfile b/Gemfile
index 90916225..a1da36ae 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,5 +1,15 @@
 source :rubygems
-gem 'actionpack'
-gem 'rspec'
-gem 'rake'
-gem 'rdoc'
+
+gem 'activesupport', '>= 2.3.2'
+
+# install the rails group if you want to ensure rails compatibility -
+# but you've already got rails installed anyway, right? :-)
+group :rails do
+  gem 'actionpack', '>= 2.3.2'
+end
+
+group :development do
+  gem 'rspec', '>= 2.0.1'
+  gem 'rake'
+  gem 'rdoc'
+end
diff --git a/Rakefile b/Rakefile
index 2a7e943c..aa208829 100644
--- a/Rakefile
+++ b/Rakefile
@@ -36,8 +36,6 @@ begin
     gemspec.email = "andreas.schacke@gmail.com"
     gemspec.homepage = "http://github.com/andi/simple-navigation"
     gemspec.description = "With the simple-navigation gem installed you can easily create multilevel navigations for your Rails, Sinatra or Padrino applications. The navigation is defined in a single configuration file. It supports automatic as well as explicit highlighting of the currently active navigation through regular expressions."
-    gemspec.add_development_dependency('rspec', '>= 2.0.1')
-    gemspec.add_dependency('activesupport', '>= 2.3.2')
     gemspec.authors = ["Andi Schacke", "Mark J. Titorenko"]
     gemspec.rdoc_options = ["--inline-source", "--charset=UTF-8"]
     gemspec.files = FileList["[A-Z]*", "{lib,spec,rails,generators}/**/*"] - FileList["**/*.log", "Gemfile.lock"]
diff --git a/simple-navigation.gemspec b/simple-navigation.gemspec
index 82acaf41..56f6b6ff 100644
--- a/simple-navigation.gemspec
+++ b/simple-navigation.gemspec
@@ -77,27 +77,21 @@ 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<actionpack>, [">= 0"])
-      s.add_runtime_dependency(%q<rspec>, [">= 0"])
-      s.add_runtime_dependency(%q<rake>, [">= 0"])
-      s.add_runtime_dependency(%q<rdoc>, [">= 0"])
-      s.add_development_dependency(%q<rspec>, [">= 2.0.1"])
       s.add_runtime_dependency(%q<activesupport>, [">= 2.3.2"])
+      s.add_development_dependency(%q<rspec>, [">= 2.0.1"])
+      s.add_development_dependency(%q<rake>, [">= 0"])
+      s.add_development_dependency(%q<rdoc>, [">= 0"])
     else
-      s.add_dependency(%q<actionpack>, [">= 0"])
-      s.add_dependency(%q<rspec>, [">= 0"])
+      s.add_dependency(%q<activesupport>, [">= 2.3.2"])
+      s.add_dependency(%q<rspec>, [">= 2.0.1"])
       s.add_dependency(%q<rake>, [">= 0"])
       s.add_dependency(%q<rdoc>, [">= 0"])
-      s.add_dependency(%q<rspec>, [">= 2.0.1"])
-      s.add_dependency(%q<activesupport>, [">= 2.3.2"])
     end
   else
-    s.add_dependency(%q<actionpack>, [">= 0"])
-    s.add_dependency(%q<rspec>, [">= 0"])
+    s.add_dependency(%q<activesupport>, [">= 2.3.2"])
+    s.add_dependency(%q<rspec>, [">= 2.0.1"])
     s.add_dependency(%q<rake>, [">= 0"])
     s.add_dependency(%q<rdoc>, [">= 0"])
-    s.add_dependency(%q<rspec>, [">= 2.0.1"])
-    s.add_dependency(%q<activesupport>, [">= 2.3.2"])
   end
 end