diff --git a/package-lock.json b/package-lock.json
index dcb6b85..c114fc9 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -199,9 +199,9 @@
       "dev": true
     },
     "acorn": {
-      "version": "6.4.0",
-      "resolved": "https://registry.npmjs.org/acorn/-/acorn-6.4.0.tgz",
-      "integrity": "sha512-gac8OEcQ2Li1dxIEWGZzsp2BitJxwkwcOm0zHAJLcPJaVvm58FRnk6RkuLRpU1EujipU2ZFODv2P9DLMfnV8mw==",
+      "version": "6.4.2",
+      "resolved": "https://registry.npmjs.org/acorn/-/acorn-6.4.2.tgz",
+      "integrity": "sha512-XtGIhXwF8YM8bJhGxG5kXgjkEuNGLTkoYqVE+KMR+aspr4KGYmKYg7yUe3KghyQ9yheNwLnjmzh/7+gfDBmHCQ==",
       "dev": true
     },
     "ajv-errors": {