diff --git a/Gemfile.lock b/Gemfile.lock
index 6445f21..33f76ae 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -14,6 +14,7 @@ GEM
     builder (2.1.2)
     diff-lcs (1.1.3)
     i18n (0.5.0)
+    rake (0.9.2.2)
     rspec (2.11.0)
       rspec-core (~> 2.11.0)
       rspec-expectations (~> 2.11.0)
@@ -29,6 +30,7 @@ PLATFORMS
   ruby
 
 DEPENDENCIES
+  rake
   rspec
   slugtastic!
   supermodel
diff --git a/slugtastic.gemspec b/slugtastic.gemspec
index 4d87e17..600be40 100644
--- a/slugtastic.gemspec
+++ b/slugtastic.gemspec
@@ -15,6 +15,7 @@ Gem::Specification.new do |gem|
   gem.require_paths = ["lib"]
   gem.version       = Slugtastic::VERSION
 
+  gem.add_development_dependency "rake"
   gem.add_development_dependency "rspec"
   gem.add_development_dependency "supermodel"
 end