diff --git a/package.json b/package.json
index 25203bfcc4..f04d75c916 100644
--- a/package.json
+++ b/package.json
@@ -48,7 +48,7 @@
     "core-js": "2.4.1",
     "dedent": "0.6.0",
     "dequeue": "1.0.5",
-    "diff": "3.0.1",
+    "diff": "4.0.4",
     "diffparser": "1.1.0",
     "escape-string-regexp": "1.0.5",
     "event-kit": "2.2.0",