diff --git a/Gemfile.lock b/Gemfile.lock
index d52ec6b..cd547a3 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -81,7 +81,7 @@ GEM
     crack (0.4.3)
       safe_yaml (~> 1.0.0)
     crass (1.0.5)
-    diffy (3.3.0)
+    diffy (3.4.2)
     erubi (1.9.0)
     execjs (2.7.0)
     faker (2.7.0)