diff --git a/vagrant.gemspec b/vagrant.gemspec
index 67397757b..03cdb280e 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 "net-ssh-shell", "~> 0.1.0"
   s.add_dependency "i18n", "~> 0.4.1"
   s.add_dependency "thor", "~> 0.14.2"
   s.add_dependency "virtualbox", "~> 0.8.0"