diff --git a/Gemfile.lock b/Gemfile.lock
index e3b5d54..dcfe728 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -37,7 +37,7 @@ GEM
     concurrent-ruby (1.1.6)
     crass (1.0.6)
     diff-lcs (1.4.3)
-    diffy (3.3.0)
+    diffy (3.4.2)
     erubi (1.9.0)
     git (1.7.0)
       rchardet (~> 1.8)