diff --git a/package-lock.json b/package-lock.json
index 9a773ab..807e89a 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -282,9 +282,9 @@
       }
     },
     "acorn": {
-      "version": "6.2.0",
-      "resolved": "http://r.cnpmjs.org/acorn/download/acorn-6.2.0.tgz",
-      "integrity": "sha1-Z/DaL8M51s+11vskT9RJ8zzYu+M=",
+      "version": "6.4.1",
+      "resolved": "https://registry.npmjs.org/acorn/-/acorn-6.4.1.tgz",
+      "integrity": "sha512-ZVA9k326Nwrj3Cj9jlh3wGFutC2ZornPNARZwsNYqQYgN0EsV2d53w5RN/co65Ohn4sUAUtb1rSUAOD6XN9idA==",
       "dev": true
     },
     "ajv": {