diff --git a/package-lock.json b/package-lock.json
index 31f93ae..acc72de 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -134,7 +134,7 @@
         },
         "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": {
@@ -208,7 +208,7 @@
       "dependencies": {
         "resolve": {
           "version": "1.1.7",
-          "resolved": "http://registry.npmjs.org/resolve/-/resolve-1.1.7.tgz",
+          "resolved": "https://registry.npmjs.org/resolve/-/resolve-1.1.7.tgz",
           "integrity": "sha1-IDEU2CrSxe2ejgQRs5ModeiJ6Xs=",
           "dev": true
         }
@@ -647,9 +647,9 @@
       }
     },
     "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",