diff --git a/lib/ostruct.gemspec b/lib/ostruct.gemspec
index 61bf6e7dee..08a7aefb05 100644
--- a/lib/ostruct.gemspec
+++ b/lib/ostruct.gemspec
@@ -21,8 +21,4 @@ Gem::Specification.new do |spec|
 
   spec.files         = [".gitignore", "Gemfile", "LICENSE.txt", "README.md", "Rakefile", "bin/console", "bin/setup", "lib/ostruct.rb", "ostruct.gemspec"]
   spec.require_paths = ["lib"]
-
-  spec.add_development_dependency "bundler"
-  spec.add_development_dependency "rake"
-  spec.add_development_dependency "test-unit"
 end