iruby-chartkick.gemspec in iruby-chartkick-0.2.0 vs iruby-chartkick.gemspec in iruby-chartkick-0.2.1

@@ -27,8 +27,8 @@
 
   spec.add_runtime_dependency "iruby"
   spec.add_runtime_dependency "chartkick"
 
   spec.add_development_dependency "bundler"
-  spec.add_development_dependency "rake", "~> 10.0"
+  spec.add_development_dependency "rake", "~> 13.0"
   spec.add_development_dependency "rspec", "~> 3.0"
 end