diff --git a/package-lock.json b/package-lock.json
index 001c3b9..2f42778 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -489,9 +489,9 @@
       "dev": true
     },
     "acorn": {
-      "version": "5.7.3",
-      "resolved": "http://r.cnpmjs.org/acorn/download/acorn-5.7.3.tgz",
-      "integrity": "sha1-Z6ojG/iBKXS4UjWpZ3Hra9B+onk=",
+      "version": "5.7.4",
+      "resolved": "https://registry.npmjs.org/acorn/-/acorn-5.7.4.tgz",
+      "integrity": "sha512-1D++VG7BhrtvQpNbBzovKNc1FLGGEE/oGe7b9xJm/RFHMBeUaUGpluV9RLjZa47YFdPcDAenEYuq9pQPcMdLJg==",
       "dev": true
     },
     "acorn-globals": {
@@ -505,9 +505,9 @@
       },
       "dependencies": {
         "acorn": {
-          "version": "6.2.1",
-          "resolved": "http://r.cnpmjs.org/acorn/download/acorn-6.2.1.tgz",
-          "integrity": "sha1-PthCLW3sCeYSHMeoQ8qGozCoa1E=",
+          "version": "6.4.1",
+          "resolved": "https://registry.npmjs.org/acorn/-/acorn-6.4.1.tgz",
+          "integrity": "sha512-ZVA9k326Nwrj3Cj9jlh3wGFutC2ZornPNARZwsNYqQYgN0EsV2d53w5RN/co65Ohn4sUAUtb1rSUAOD6XN9idA==",
           "dev": true
         }
       }