diff --git a/mikunyan.gemspec b/mikunyan.gemspec
index 9df9478..b59edf6 100644
--- a/mikunyan.gemspec
+++ b/mikunyan.gemspec
@@ -32,5 +32,6 @@ Gem::Specification.new do |spec|
   spec.add_development_dependency 'bundler', '~> 2'
   spec.add_development_dependency 'oily_png', '~> 1'
   spec.add_development_dependency 'pry', '~> 0'
+  spec.add_development_dependency 'rake-compiler'
   spec.add_development_dependency 'usamin', '~> 7'
 end