diff --git a/jekyll.gemspec b/jekyll.gemspec
index 84780365..6843ff45 100644
--- a/jekyll.gemspec
+++ b/jekyll.gemspec
@@ -28,7 +28,6 @@ Gem::Specification.new do |s|
   s.add_runtime_dependency('directory_watcher', ">= 1.1.1")
   s.add_runtime_dependency('maruku', ">= 0.5.9")
   s.add_runtime_dependency('albino', ">= 1.3.2")
-  s.add_runtime_dependency('rdiscount', ">= 1.6.8")
 
   s.add_development_dependency('redgreen', ">= 1.2.2")
   s.add_development_dependency('shoulda', ">= 2.11.3")
@@ -36,6 +35,7 @@ Gem::Specification.new do |s|
   s.add_development_dependency('cucumber', ">= 0.10.0")
   s.add_development_dependency('RedCloth', ">= 4.2.1")
   s.add_development_dependency('kramdown', ">= 0.12.0")
+  s.add_development_dependency('rdiscount', ">= 1.6.5")
 
   # = MANIFEST =
   s.files = %w[