diff --git a/package.json b/package.json
index e5c735f..8ba20e7 100644
--- a/package.json
+++ b/package.json
@@ -28,7 +28,7 @@
     "isparta": "4",
     "lodash": "4",
     "mocha": "2",
-    "path-to-regexp": "1",
+    "path-to-regexp": "1.5.1",
     "power-assert": "1",
     "route-recognizer": "0",
     "route-trie": "1",