diff --git a/barometer.gemspec b/barometer.gemspec
index 67fcb28..ce65900 100644
--- a/barometer.gemspec
+++ b/barometer.gemspec
@@ -31,5 +31,6 @@ Gem::Specification.new do |s|
   s.add_development_dependency("rspec", "~> 2.6")
   s.add_development_dependency("mocha")
   s.add_development_dependency("fakeweb")
+  s.add_development_dependency("rake")
 end