diff --git a/chef-zero.gemspec b/chef-zero.gemspec
index e05c6f6b..9b4a82e6 100644
--- a/chef-zero.gemspec
+++ b/chef-zero.gemspec
@@ -17,7 +17,7 @@ Gem::Specification.new do |s|
   s.add_dependency "hashie", ">= 2.0", "< 4.0"
   s.add_dependency "uuidtools", "~> 2.1"
   s.add_dependency "ffi-yajl", "~> 2.2"
-  s.add_dependency "rack", "~> 2.0"
+  s.add_dependency "rack", "~> 2.0", ">= 2.0.6"
 
   s.add_development_dependency "rake"
   s.add_development_dependency "rspec"