diff --git a/vagrant.gemspec b/vagrant.gemspec
index a2115b055..0afe7e766 100644
--- a/vagrant.gemspec
+++ b/vagrant.gemspec
@@ -26,7 +26,7 @@ Gem::Specification.new do |s|
   s.add_dependency "net-sftp", "~> 2.1"
   s.add_dependency "net-scp", "~> 1.1.0"
   s.add_dependency "rb-kqueue", "~> 0.2.0"
-  s.add_dependency "rest-client", "~> 1.7"
+  s.add_dependency "rest-client", ">= 1.6.0", "< 2.0"
   s.add_dependency "wdm", "~> 0.1.0"
   s.add_dependency "winrm", "~> 1.1.3"