diff --git a/Gemfile.lock b/Gemfile.lock
index 15221eed..9d771a3a 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -96,6 +96,7 @@ PATH
       simple_states (~> 1.0.0)
       sinatra (~> 1.3)
       sinatra-contrib (~> 1.3)
+      tool
       travis-support
       useragent
       virtus (~> 1.0.0)
diff --git a/travis-api.gemspec b/travis-api.gemspec
index e8c75eb2..2563014e 100644
--- a/travis-api.gemspec
+++ b/travis-api.gemspec
@@ -21,6 +21,7 @@ Gem::Specification.new do |s|
   s.add_dependency 'rack-contrib',           '~> 1.1'
   s.add_dependency 'memcachier'
   s.add_dependency 'useragent'
+  s.add_dependency 'tool'
 
   # from travis-core gemspec
 
@@ -36,4 +37,3 @@ Gem::Specification.new do |s|
   s.add_dependency 'multi_json'
   s.add_dependency 'google-api-client', '~> 0.9.4'
 end
-