diff --git a/Gemfile.lock b/Gemfile.lock
index f1170e1..1cf107f 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -47,7 +47,7 @@ GEM
     database_cleaner (1.6.2)
     debug_inspector (0.0.3)
     diff-lcs (1.3)
-    diffy (3.3.0)
+    diffy (3.4.2)
     docile (1.3.1)
     erubi (1.8.0)
     grit (2.5.0)