diff --git a/package-lock.json b/package-lock.json
index 39f81b6..654b560 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -21,9 +21,9 @@
             "dev": true
         },
         "acorn": {
-            "version": "6.0.4",
-            "resolved": "https://registry.npmjs.org/acorn/-/acorn-6.0.4.tgz",
-            "integrity": "sha512-VY4i5EKSKkofY2I+6QLTbTTN/UvEQPCo6eiwzzSaSWfpaDhOmStMCMod6wmuPciNq+XS0faCglFu2lHZpdHUtg==",
+            "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-dynamic-import": {
@@ -172,7 +172,7 @@
                 },
                 "util": {
                     "version": "0.10.3",
-                    "resolved": "http://registry.npmjs.org/util/-/util-0.10.3.tgz",
+                    "resolved": "https://registry.npmjs.org/util/-/util-0.10.3.tgz",
                     "integrity": "sha1-evsa/lCAUkZInj23/g7TeTNqwPk=",
                     "dev": true,
                     "requires": {
@@ -1829,7 +1829,7 @@
             "dependencies": {
                 "semver": {
                     "version": "5.3.0",
-                    "resolved": "http://registry.npmjs.org/semver/-/semver-5.3.0.tgz",
+                    "resolved": "https://registry.npmjs.org/semver/-/semver-5.3.0.tgz",
                     "integrity": "sha1-myzl094C0XxgEq0yaqa00M9U+U8=",
                     "dev": true
                 }
@@ -2558,7 +2558,7 @@
             "dependencies": {
                 "string_decoder": {
                     "version": "1.1.1",
-                    "resolved": "http://registry.npmjs.org/string_decoder/-/string_decoder-1.1.1.tgz",
+                    "resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-1.1.1.tgz",
                     "integrity": "sha512-n/ShnvDi6FHbbVfviro+WojiFzv+s8MPMHBczVePfUpDJLwoLT0ht1l4YwBCbi8pJAveEEdnkHyPyTP/mzRfwg==",
                     "dev": true,
                     "requires": {
@@ -2732,7 +2732,7 @@
             "dependencies": {
                 "source-map": {
                     "version": "0.4.4",
-                    "resolved": "http://registry.npmjs.org/source-map/-/source-map-0.4.4.tgz",
+                    "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.4.4.tgz",
                     "integrity": "sha1-66T12pwNyZneaAMti092FzZSA2s=",
                     "dev": true,
                     "requires": {