diff --git a/configman.gemspec b/configman.gemspec
index c7ffabc..6eca2d7 100644
--- a/configman.gemspec
+++ b/configman.gemspec
@@ -28,7 +28,6 @@ Gem::Specification.new do |spec|
 
   # Uncomment to register a new dependency of your gem
   # spec.add_dependency "example-gem", "~> 1.0"
-  spec.add_dependency 'deep_dup'
   spec.add_dependency 'inifile'
 
   # For more information and examples about making a new gem, check out our