diff --git a/chef-zero.gemspec b/chef-zero.gemspec
index 44c5d80..221bb7e 100644
--- a/chef-zero.gemspec
+++ b/chef-zero.gemspec
@@ -15,7 +15,7 @@ Gem::Specification.new do |s|
 
   s.add_dependency "mixlib-log", ">= 2.0", "< 4.0"
   s.add_dependency "hashie", ">= 2.0", "< 6.0"
-  s.add_dependency "uuidtools", "~> 2.1"
+  s.add_dependency "uuidtools", ">= 2.1", "< 4.0"
   s.add_dependency "ffi-yajl", ">= 2.2", "< 4.0"
   s.add_dependency "rack", "~> 3.1", ">= 3.1.16"
   s.add_dependency "rackup", "~> 2.2", ">= 2.2.1"