diff --git a/README.md b/README.md
index f19b2fb..b869f33 100644
--- a/README.md
+++ b/README.md
@@ -11,13 +11,13 @@ Jekyll Responsive Images is a [Jekyll](http://jekyllrb.com/) plugin and utility
 Install the gem yourself
 
 ```
-$ gem install jekyll-responsive-image
+$ gem install jekyll-responsive_image
 ```
 
 Or simply add it to your Jekyll `_config.yml`:
 
 ```yaml
-gems: [jekyll-responsive-image]
+gems: [jekyll-responsive_image]
 ```
 
 ## Configuration
diff --git a/Rakefile b/Rakefile
index 9c92c89..7f9653b 100644
--- a/Rakefile
+++ b/Rakefile
@@ -21,8 +21,8 @@ task :features_with_coveralls => [:features, 'coveralls:push']
 task :default => [:features]
 
 task :release do |t|
-  system "gem build jekyll-responsive-image.gemspec"
+  system "gem build jekyll-responsive_image.gemspec"
   system "git tag v#{Jekyll::ResponsiveImage::VERSION}"
   system "git push --tags"
-  system "gem push jekyll-responsive-image-#{Jekyll::ResponsiveImage::VERSION}.gem"
+  system "gem push jekyll-responsive_image-#{Jekyll::ResponsiveImage::VERSION}.gem"
 end
diff --git a/jekyll-responsive-image.gemspec b/jekyll-responsive_image.gemspec
similarity index 78%
rename from jekyll-responsive-image.gemspec
rename to jekyll-responsive_image.gemspec
index 98ce4bc..0f641b0 100644
--- a/jekyll-responsive-image.gemspec
+++ b/jekyll-responsive_image.gemspec
@@ -5,7 +5,7 @@ $:.unshift lib unless $:.include?(lib)
 require 'jekyll/responsive_image/version'
 
 Gem::Specification.new do |spec|
-  spec.name          = 'jekyll-responsive-image'
+  spec.name          = 'jekyll-responsive_image'
   spec.version       = Jekyll::ResponsiveImage::VERSION
   spec.authors       = ['Joseph Wynn']
   spec.email         = ['joseph@wildlyinaccurate.com']
@@ -17,10 +17,10 @@ Gem::Specification.new do |spec|
     Its intended use is for sites which want to display responsive images using something like srcset or Imager.js.
   }
 
-  spec.files         = `git ls-files`.split($/)
-  spec.test_files    = `git ls-files -- {test,spec,features}/*`.split("\n")
-  spec.executables   = []
-  spec.require_paths = ['lib']
+  spec.files        = `git ls-files`.split($/)
+  spec.test_files   = `git ls-files -- {test,spec,features}/*`.split("\n")
+  spec.executables  = []
+  spec.require_path = 'lib'
 
   spec.add_runtime_dependency 'jekyll', '~> 2.0'
   spec.add_runtime_dependency 'rmagick'