diff --git a/Gemfile.lock b/Gemfile.lock
index 4a80a18..0baaf74 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -65,7 +65,7 @@ DEPENDENCIES
   rake (~> 10.0.3)
   rake-minify
   rb-fsevent (~> 0.9.3)
-  rdiscount
+  rdiscount (~> 1.6.8)
   redcarpet (~> 2.2.2)
   rubypants (~> 0.2.0)
   sinatra (~> 1.3.3)