diff --git a/package-lock.json b/package-lock.json
index 5834dafc..8a6da584 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -248,9 +248,9 @@
       "dev": true
     },
     "diff": {
-      "version": "1.0.8",
-      "resolved": "https://registry.npmjs.org/diff/-/diff-1.0.8.tgz",
-      "integrity": "sha1-NDJ2MI7Jkbe8giZ+1VvBQR+XFmY="
+      "version": "3.5.0",
+      "resolved": "https://registry.npmjs.org/diff/-/diff-3.5.0.tgz",
+      "integrity": "sha512-A46qtFgd+g7pDZinpnwiRJtxbC1hpgf0uzP3iG89scHk0AUC7A1TGxf5OiiOUv/JMZR8GOt8hL900hV0bOy5xA=="
     },
     "dom-serializer": {
       "version": "0.1.0",
diff --git a/package.json b/package.json
index 4d795248..06e767f5 100644
--- a/package.json
+++ b/package.json
@@ -29,7 +29,7 @@
   "dependencies": {
     "chalk": "1.0.0",
     "coa": "0.4.0",
-    "diff": "1.0.8",
+    "diff": "3.5.0",
     "lodash": "^4.0.0",
     "parse5": "1.1.3",
     "vow": "0.4.13",