diff --git a/Gemfile.lock b/Gemfile.lock
index 03101a1..fa8e35c 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -19,7 +19,7 @@ GEM
     maruku (0.6.0)
       syntax (>= 1.0.0)
     posix-spawn (0.3.6)
-    rdiscount (1.6.8)
+    rdiscount (2.2.7.4)
     syntax (1.0.0)
 
 PLATFORMS