diff --git a/package.json b/package.json
index 92cec59..94403b2 100644
--- a/package.json
+++ b/package.json
@@ -58,7 +58,8 @@
     "tape": "^4.10.1",
     "uglify-js": "^2.8.29",
     "minimist": "^1.2.6",
-    "json-schema": "^0.4.0"
+    "json-schema": "^0.4.0",
+    "parse-url": "^8.1.0"
   },
   "peerDependencies": {
     "mapbox-gl": ">= 0.47.0 < 3.0.0"