diff --git a/package-lock.json b/package-lock.json
index d548bc8..b10d2ab 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -426,7 +426,7 @@
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-                    "resolved": "http://registry.npmjs.org/util/-/util-0.10.3.tgz",
+                    "resolved": "https://registry.npmjs.org/util/-/util-0.10.3.tgz",
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@@ -517,7 +517,7 @@
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-                    "resolved": "http://registry.npmjs.org/chalk/-/chalk-1.1.3.tgz",
+                    "resolved": "https://registry.npmjs.org/chalk/-/chalk-1.1.3.tgz",
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                     "dev": true,
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@@ -1503,7 +1503,7 @@
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-                    "resolved": "http://registry.npmjs.org/domelementtype/-/domelementtype-1.1.3.tgz",
+                    "resolved": "https://registry.npmjs.org/domelementtype/-/domelementtype-1.1.3.tgz",
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@@ -1565,18 +1565,32 @@
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-            "resolved": "https://registry.npmjs.org/elliptic/-/elliptic-6.4.1.tgz",
-            "integrity": "sha512-BsXLz5sqX8OHcsh7CqBMztyXARmGQ3LWPtGjJi6DiJHq5C/qvi9P3OqgswKSDftbu8+IoI/QDTAm2fFnQ9SZSQ==",
+            "version": "6.5.4",
+            "resolved": "https://registry.npmjs.org/elliptic/-/elliptic-6.5.4.tgz",
+            "integrity": "sha512-iLhC6ULemrljPZb+QutR5TQGB+pdW6KGD5RSegS+8sorOZT+rdQFbsQFJgvN3eRqNALqJer4oQ16YvJHlU8hzQ==",
             "dev": true,
             "requires": {
-                "bn.js": "^4.4.0",
-                "brorand": "^1.0.1",
+                "bn.js": "^4.11.9",
+                "brorand": "^1.1.0",
                 "hash.js": "^1.0.0",
-                "hmac-drbg": "^1.0.0",
-                "inherits": "^2.0.1",
-                "minimalistic-assert": "^1.0.0",
-                "minimalistic-crypto-utils": "^1.0.0"
+                "hmac-drbg": "^1.0.1",
+                "inherits": "^2.0.4",
+                "minimalistic-assert": "^1.0.1",
+                "minimalistic-crypto-utils": "^1.0.1"
+            },
+            "dependencies": {
+                "bn.js": {
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+                    "resolved": "https://registry.npmjs.org/bn.js/-/bn.js-4.12.0.tgz",
+                    "integrity": "sha512-c98Bf3tPniI+scsdk237ku1Dc3ujXQTSgyiPUDEOe7tRkhrqridvh8klBv0HCEso1OLOYcHuCv/cS6DNxKH+ZA==",
+                    "dev": true
+                },
+                "inherits": {
+                    "version": "2.0.4",
+                    "resolved": "https://registry.npmjs.org/inherits/-/inherits-2.0.4.tgz",
+                    "integrity": "sha512-k/vGaX4/Yla3WzyMCvTQOXYeIHvqOKtnqBduzTHpzpQZzAskKMhZ2K+EnBiSM9zGSoIFeMpXKxa4dYeZIQqewQ==",
+                    "dev": true
+                }
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         },
         "email-addresses": {
@@ -2047,7 +2061,7 @@
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         "finalhandler": {
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-            "resolved": "http://registry.npmjs.org/finalhandler/-/finalhandler-1.1.1.tgz",
+            "resolved": "https://registry.npmjs.org/finalhandler/-/finalhandler-1.1.1.tgz",
             "integrity": "sha512-Y1GUDo39ez4aHAw7MysnUD5JzYX+WaIj8I57kO3aEPT1fFRL4sr7mjei97FgnwhAyyzRYmQZaTHb2+9uZ1dPtg==",
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@@ -2508,7 +2522,7 @@
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-                    "resolved": "http://registry.npmjs.org/readable-stream/-/readable-stream-1.0.34.tgz",
+                    "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-1.0.34.tgz",
                     "integrity": "sha1-Elgg40vIQtLyqq+v5MKRbuMsFXw=",
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@@ -2534,7 +2548,7 @@
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-            "resolved": "http://registry.npmjs.org/http-errors/-/http-errors-1.6.3.tgz",
+            "resolved": "https://registry.npmjs.org/http-errors/-/http-errors-1.6.3.tgz",
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@@ -2983,7 +2997,7 @@
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-            "resolved": "http://registry.npmjs.org/json5/-/json5-0.5.1.tgz",
+            "resolved": "https://registry.npmjs.org/json5/-/json5-0.5.1.tgz",
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@@ -3841,7 +3855,7 @@
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         "pify": {
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-            "resolved": "http://registry.npmjs.org/pify/-/pify-2.3.0.tgz",
+            "resolved": "https://registry.npmjs.org/pify/-/pify-2.3.0.tgz",
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@@ -4136,7 +4150,7 @@
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-            "resolved": "http://registry.npmjs.org/readable-stream/-/readable-stream-2.3.6.tgz",
+            "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-2.3.6.tgz",
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@@ -5178,7 +5192,7 @@
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         "strip-ansi": {
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-            "resolved": "http://registry.npmjs.org/strip-ansi/-/strip-ansi-3.0.1.tgz",
+            "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-3.0.1.tgz",
             "integrity": "sha1-ajhfuIU9lS1f8F0Oiq+UJ43GPc8=",
             "dev": true,
             "requires": {