diff --git a/vagrant.gemspec b/vagrant.gemspec
index 1b1bdc318..c0118db39 100644
--- a/vagrant.gemspec
+++ b/vagrant.gemspec
@@ -18,9 +18,12 @@ Gem::Specification.new do |s|
   s.add_dependency "childprocess", "~> 0.3.7"
   s.add_dependency "erubis", "~> 2.7.0"
   s.add_dependency "i18n", "~> 0.6.0"
+  s.add_dependency "listen", "~> 2.4.0"
   s.add_dependency "log4r", "~> 1.1.9", "< 1.1.11"
   s.add_dependency "net-ssh", ">= 2.6.6", "< 2.8.0"
   s.add_dependency "net-scp", "~> 1.1.0"
+  s.add_dependency "rb-kqueue", "~> 0.2.0"
+  s.add_dependency "wdm", "~> 0.1.0"
 
   s.add_development_dependency "rake"
   s.add_development_dependency "contest", ">= 0.1.2"