diff --git a/package-lock.json b/package-lock.json
index a0c2a31..15b3edb 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -9584,9 +9584,9 @@
       "dev": true
     },
     "source-map": {
-      "version": "0.7.1",
-      "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.7.1.tgz",
-      "integrity": "sha512-c+mPk+5wTnOd1y9oyVp0EQIo3N8k8gdxzxOo7jq1ApEN2+ew5c/UV+F1wtNHeS6Aa4JPsxiq5OU+95aMpRTGJA=="
+      "version": "0.5.7",
+      "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.5.7.tgz",
+      "integrity": "sha1-igOdLRAh0i0eoUyA2OpGi6LvP8w="
     },
     "source-map-resolve": {
       "version": "0.5.1",
diff --git a/package.json b/package.json
index 796a386..af758ec 100644
--- a/package.json
+++ b/package.json
@@ -41,6 +41,7 @@
     "babel-polyfill": "^6.0.0",
     "babel-preset-env": "^1.0.0",
     "babel-register": "^6.0.0",
+    "babel-runtime": "^6.0.0",
     "chai": "^4.0.0",
     "chai-as-promised": "^7.0.0",
     "cross-env": "^5.0.0",