diff --git a/package-lock.json b/package-lock.json
index 2fe0239..ccf60dc 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -25,9 +25,9 @@
       }
     },
     "acorn": {
-      "version": "6.2.0",
-      "resolved": "https://registry.npmjs.org/acorn/-/acorn-6.2.0.tgz",
-      "integrity": "sha512-8oe72N3WPMjA+2zVG71Ia0nXZ8DpQH+QyyHO+p06jT8eg8FGG3FbcUIi8KziHlAfheJQZeoqbvq1mQSQHXKYLw==",
+      "version": "6.4.2",
+      "resolved": "https://registry.npmjs.org/acorn/-/acorn-6.4.2.tgz",
+      "integrity": "sha512-XtGIhXwF8YM8bJhGxG5kXgjkEuNGLTkoYqVE+KMR+aspr4KGYmKYg7yUe3KghyQ9yheNwLnjmzh/7+gfDBmHCQ==",
       "dev": true
     },
     "acorn-jsx": {
diff --git a/yarn.lock b/yarn.lock
index 8ddd541..5517514 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -24,9 +24,9 @@ acorn-jsx@^5.0.0:
   integrity sha1-MqBk/ZJUKSFqCbFBECv90YX65A4=
 
 acorn@^6.0.7:
-  version "6.2.0"
-  resolved "https://registry.npm.taobao.org/acorn/download/acorn-6.2.0.tgz?cache=0&other_urls=https%3A%2F%2Fregistry.npm.taobao.org%2Facorn%2Fdownload%2Facorn-6.2.0.tgz#67f0da2fc339d6cfb5d6fb244fd449f33cd8bbe3"
-  integrity sha1-Z/DaL8M51s+11vskT9RJ8zzYu+M=
+  version "6.4.2"
+  resolved "https://registry.yarnpkg.com/acorn/-/acorn-6.4.2.tgz#35866fd710528e92de10cf06016498e47e39e1e6"
+  integrity sha512-XtGIhXwF8YM8bJhGxG5kXgjkEuNGLTkoYqVE+KMR+aspr4KGYmKYg7yUe3KghyQ9yheNwLnjmzh/7+gfDBmHCQ==
 
 ajv@^6.5.5, ajv@^6.9.1:
   version "6.10.2"