diff --git a/Gemfile.lock b/Gemfile.lock
index d57059edf..71de2b5db 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -24,6 +24,7 @@ PATH
       net-scp (~> 1.0.3)
       net-ssh (~> 2.0.23)
       radar
+      thor
       virtualbox (~> 0.7.3)
 
 GEM
@@ -45,6 +46,7 @@ GEM
       net-ssh (>= 1.99.1)
     net-ssh (2.0.23)
     rake (0.8.7)
+    thor (0.14.0)
     yard (0.5.8)
 
 PLATFORMS
diff --git a/vagrant.gemspec b/vagrant.gemspec
index adf92c26b..824c03138 100644
--- a/vagrant.gemspec
+++ b/vagrant.gemspec
@@ -19,6 +19,7 @@ Gem::Specification.new do |s|
   s.add_dependency "mario", "~> 0.0.6"
   s.add_dependency "net-ssh", "~> 2.0.23"
   s.add_dependency "net-scp", "~> 1.0.3"
+  s.add_dependency "thor"
   s.add_dependency "radar"
   s.add_dependency "virtualbox", "~> 0.7.3"