diff --git a/package-lock.json b/package-lock.json
index 0a754eb..6b477fe 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -66,9 +66,9 @@
       }
     },
     "acorn": {
-      "version": "6.1.1",
-      "resolved": "https://registry.npmjs.org/acorn/-/acorn-6.1.1.tgz",
-      "integrity": "sha512-jPTiwtOxaHNaAPg/dmrJ/beuzLRnXtB0kQPQ8JpotKJgTB6rX6c8mlf315941pyjBSaPg8NHXS9fhP4u17DpGA==",
+      "version": "6.4.1",
+      "resolved": "https://registry.npmjs.org/acorn/-/acorn-6.4.1.tgz",
+      "integrity": "sha512-ZVA9k326Nwrj3Cj9jlh3wGFutC2ZornPNARZwsNYqQYgN0EsV2d53w5RN/co65Ohn4sUAUtb1rSUAOD6XN9idA==",
       "dev": true
     },
     "acorn-jsx": {
@@ -886,11 +886,6 @@
         "flat-cache": "^2.0.1"
       }
     },
-    "file-saver": {
-      "version": "2.0.2",
-      "resolved": "https://registry.npm.taobao.org/file-saver/download/file-saver-2.0.2.tgz",
-      "integrity": "sha1-BtbnKKnqLfLM4vjZ6E383DOOwXo="
-    },
     "find-up": {
       "version": "2.1.0",
       "resolved": "https://registry.npmjs.org/find-up/-/find-up-2.1.0.tgz",