diff --git a/jekyll-feed.gemspec b/jekyll-feed.gemspec
index ce127e06..fb627b61 100644
--- a/jekyll-feed.gemspec
+++ b/jekyll-feed.gemspec
@@ -20,9 +20,9 @@ Gem::Specification.new do |spec|
 
   spec.add_dependency "jekyll", "~> 3.3"
 
-  spec.add_development_dependency "bundler", "~> 1.6"
+  spec.add_development_dependency "bundler", "~> 1.15"
   spec.add_development_dependency "nokogiri", "~> 1.6"
-  spec.add_development_dependency "rake", "~> 10.0"
+  spec.add_development_dependency "rake", "~> 12.0"
   spec.add_development_dependency "rspec", "~> 3.0"
   spec.add_development_dependency "rubocop", "0.51"
   spec.add_development_dependency "typhoeus", "~> 0.7"