diff --git a/Gemfile.lock b/Gemfile.lock
index 761ca6d..a96e813 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -65,7 +65,7 @@ GEM
     decorators (2.0.5)
       railties (>= 4.0.0, < 7)
     diff-lcs (1.3)
-    diffy (3.3.0)
+    diffy (3.4.2)
     dragonfly (1.2.0)
       addressable (~> 2.3)
       multi_json (~> 1.0)