diff --git a/package.json b/package.json
index 14e178c5b..343b0818a 100644
--- a/package.json
+++ b/package.json
@@ -47,7 +47,7 @@
     "cldrjs": "0.5.0",
     "cross-fetch": "3.0.2",
     "css-select-umd": "1.3.0-rc0",
-    "diff": "3.5.0",
+    "diff": "4.0.4",
     "globalize": "1.4.0",
     "immutable": "3.8.2",
     "intersection-observer": "0.4.2",