diff --git a/package-lock.json b/package-lock.json
index 39f81b6..b88b982 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -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": {
@@ -993,9 +993,9 @@
             "dev": true
         },
         "elliptic": {
-            "version": "6.4.1",
-            "resolved": "https://registry.npmjs.org/elliptic/-/elliptic-6.4.1.tgz",
-            "integrity": "sha512-BsXLz5sqX8OHcsh7CqBMztyXARmGQ3LWPtGjJi6DiJHq5C/qvi9P3OqgswKSDftbu8+IoI/QDTAm2fFnQ9SZSQ==",
+            "version": "6.5.3",
+            "resolved": "https://registry.npmjs.org/elliptic/-/elliptic-6.5.3.tgz",
+            "integrity": "sha512-IMqzv5wNQf+E6aHeIqATs0tOLeOTwj1QKbRcS3jBbYkl5oLAserA8yJTT7/VyHUYG91PRmPyeQDObKLPpeS4dw==",
             "dev": true,
             "requires": {
                 "bn.js": "^4.4.0",
@@ -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": {