diff --git a/package-lock.json b/package-lock.json
index 7460718..2dd8a25 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -54,9 +54,9 @@
       }
     },
     "acorn": {
-      "version": "6.1.1",
-      "resolved": "https://registry.npmjs.org/acorn/-/acorn-6.1.1.tgz",
-      "integrity": "sha512-jPTiwtOxaHNaAPg/dmrJ/beuzLRnXtB0kQPQ8JpotKJgTB6rX6c8mlf315941pyjBSaPg8NHXS9fhP4u17DpGA==",
+      "version": "6.4.2",
+      "resolved": "https://registry.npmjs.org/acorn/-/acorn-6.4.2.tgz",
+      "integrity": "sha512-XtGIhXwF8YM8bJhGxG5kXgjkEuNGLTkoYqVE+KMR+aspr4KGYmKYg7yUe3KghyQ9yheNwLnjmzh/7+gfDBmHCQ==",
       "dev": true
     },
     "acorn-jsx": {
@@ -386,7 +386,7 @@
       "dependencies": {
         "callsites": {
           "version": "2.0.0",
-          "resolved": "http://registry.npmjs.org/callsites/-/callsites-2.0.0.tgz",
+          "resolved": "https://registry.npmjs.org/callsites/-/callsites-2.0.0.tgz",
           "integrity": "sha1-BuuE8A7qQT2oav/vrL/7Ngk7PFA=",
           "dev": true
         }
@@ -2147,7 +2147,7 @@
       "dependencies": {
         "get-stream": {
           "version": "3.0.0",
-          "resolved": "http://registry.npmjs.org/get-stream/-/get-stream-3.0.0.tgz",
+          "resolved": "https://registry.npmjs.org/get-stream/-/get-stream-3.0.0.tgz",
           "integrity": "sha1-jpQ9E1jcN1VQVOy+LtsFqhdO3hQ=",
           "dev": true
         }
@@ -4354,7 +4354,7 @@
         },
         "get-stream": {
           "version": "3.0.0",
-          "resolved": "http://registry.npmjs.org/get-stream/-/get-stream-3.0.0.tgz",
+          "resolved": "https://registry.npmjs.org/get-stream/-/get-stream-3.0.0.tgz",
           "integrity": "sha1-jpQ9E1jcN1VQVOy+LtsFqhdO3hQ=",
           "dev": true
         }