diff --git a/package-lock.json b/package-lock.json
index de0d681..6dcfe03 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -48,9 +48,9 @@
       }
     },
     "acorn": {
-      "version": "5.7.1",
-      "resolved": "http://registry.npm.taobao.org/acorn/download/acorn-5.7.1.tgz",
-      "integrity": "sha1-8JWCkpdwanyXdpWMCvyJMKm52dg="
+      "version": "5.7.4",
+      "resolved": "https://registry.npmjs.org/acorn/-/acorn-5.7.4.tgz",
+      "integrity": "sha512-1D++VG7BhrtvQpNbBzovKNc1FLGGEE/oGe7b9xJm/RFHMBeUaUGpluV9RLjZa47YFdPcDAenEYuq9pQPcMdLJg=="
     },
     "ajv": {
       "version": "4.11.8",