diff --git a/node_modules/path-to-regexp/package.json b/node_modules/path-to-regexp/package.json
index c58301982e..b4569c394b 100644
--- a/node_modules/path-to-regexp/package.json
+++ b/node_modules/path-to-regexp/package.json
@@ -35,7 +35,7 @@
   "devDependencies": {
     "chai": "^2.3.0",
     "istanbul": "~0.3.0",
-    "mocha": "~2.2.4",
+    "mocha": "~4.0.0",
     "standard": "~3.7.3",
     "ts-node": "^0.5.5",
     "typescript": "^1.8.7",