diff --git a/Gemfile.lock b/Gemfile.lock
index 528a83d1..d112690a 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -69,7 +69,7 @@ GEM
     database_cleaner (1.5.3)
     debug_inspector (0.0.2)
     diff-lcs (1.2.5)
-    diffy (3.1.0)
+    diffy (3.4.1)
     docile (1.1.5)
     dotenv (2.1.1)
     erubis (2.7.0)