diff --git a/Gemfile.lock b/Gemfile.lock
index 037b3d5..2589a32 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -65,7 +65,7 @@ GEM
       orm_adapter (~> 0.1)
       railties (~> 3.1)
       warden (~> 1.2.1)
-    diffy (2.0.8)
+    diffy (3.4.1)
     erubis (2.7.0)
     eventmachine (0.12.10)
     execjs (1.4.0)