diff --git a/package.json b/package.json
index 4e9dac24b66b338b20473d923a369efcdef99a18..9900abe704946d8c4bb67eb95e7604dd7fbe9e04 100644
--- a/package.json
+++ b/package.json
@@ -37,6 +37,7 @@
     "rxjs": "^6.3.3",
     "rxjs-compat": "^6.2.2",
     "tslint-eslint-rules": "^5.3.1",
+    "typescript-map": "0.0.7",
     "zone.js": "^0.8.26"
   },
   "devDependencies": {