diff --git a/jekyll.gemspec b/jekyll.gemspec
index 3dfb3cd0..d61264a7 100644
--- a/jekyll.gemspec
+++ b/jekyll.gemspec
@@ -31,7 +31,7 @@ Gem::Specification.new do |s|
   s.add_runtime_dependency('liquid', "~> 2.5.5")
   s.add_runtime_dependency('classifier', "~> 1.3")
   s.add_runtime_dependency('listen', "~> 2.5")
-  s.add_runtime_dependency('maruku', "0.7.0")
+  s.add_runtime_dependency('kramdown', "~> 1.3")
   s.add_runtime_dependency('pygments.rb', "~> 0.5.0")
   s.add_runtime_dependency('mercenary', "~> 0.3.1")
   s.add_runtime_dependency('safe_yaml', "~> 1.0")
@@ -48,7 +48,7 @@ Gem::Specification.new do |s|
   s.add_development_dependency('rr', "~> 1.1")
   s.add_development_dependency('cucumber', "1.3.11")
   s.add_development_dependency('RedCloth', "~> 4.2")
-  s.add_development_dependency('kramdown', "~> 1.3")
+  s.add_development_dependency('maruku', "0.7.0")
   s.add_development_dependency('rdiscount', "~> 1.6")
   s.add_development_dependency('launchy', "~> 2.3")
   s.add_development_dependency('simplecov', "~> 0.7")