diff --git a/package-lock.json b/package-lock.json
index a579a7d..17bd8d3 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1450,7 +1450,7 @@
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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",
                     "integrity": "sha1-qBFcVeSnAv5NFQq9OHKCKn4J/Jg=",
                     "dev": true,
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@@ -2625,7 +2625,7 @@
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                 "regexpu-core": {
                     "version": "1.0.0",
-                    "resolved": "http://registry.npmjs.org/regexpu-core/-/regexpu-core-1.0.0.tgz",
+                    "resolved": "https://registry.npmjs.org/regexpu-core/-/regexpu-core-1.0.0.tgz",
                     "integrity": "sha1-hqdj9Y7k18L2sQLkdkBQ3n7ZDGs=",
                     "dev": true,
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@@ -3111,18 +3111,32 @@
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-            "resolved": "https://registry.npmjs.org/elliptic/-/elliptic-6.5.0.tgz",
-            "integrity": "sha512-eFOJTMyCYb7xtE/caJ6JJu+bhi67WCYNbkGSknu20pmM8Ke/bqOfdnZWxyoGN26JgfxTbXrsCkEw4KheCT/KGg==",
+            "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": {
+                    "version": "4.12.0",
+                    "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
+                }
             }
         },
         "emoji-regex": {
@@ -3436,7 +3450,7 @@
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-                    "resolved": "http://registry.npmjs.org/array-flatten/-/array-flatten-1.1.1.tgz",
+                    "resolved": "https://registry.npmjs.org/array-flatten/-/array-flatten-1.1.1.tgz",
                     "integrity": "sha1-ml9pkFGx5wczKPKgCJaLZOopVdI=",
                     "dev": true
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@@ -3772,7 +3786,7 @@
                 },
                 "chalk": {
                     "version": "1.1.3",
-                    "resolved": "http://registry.npmjs.org/chalk/-/chalk-1.1.3.tgz",
+                    "resolved": "https://registry.npmjs.org/chalk/-/chalk-1.1.3.tgz",
                     "integrity": "sha1-qBFcVeSnAv5NFQq9OHKCKn4J/Jg=",
                     "dev": true,
                     "requires": {
@@ -6577,7 +6591,7 @@
             "dependencies": {
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-                    "resolved": "http://registry.npmjs.org/async/-/async-1.5.2.tgz",
+                    "resolved": "https://registry.npmjs.org/async/-/async-1.5.2.tgz",
                     "integrity": "sha1-7GphrlZIDAw8skHJVhjiCJL5Zyo=",
                     "dev": true
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@@ -7481,7 +7495,7 @@
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         "readable-stream": {
             "version": "2.3.6",
-            "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",
             "integrity": "sha512-tQtKA9WIAhBF3+VLAseyMqZeBjW0AHJoxOtYqSUZNJxauErmLbVm2FW1y+J/YA9dUrAC39ITejlZWhVIwawkKw==",
             "dev": true,
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@@ -7600,7 +7614,7 @@
             "dependencies": {
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                     "version": "0.5.0",
-                    "resolved": "http://registry.npmjs.org/jsesc/-/jsesc-0.5.0.tgz",
+                    "resolved": "https://registry.npmjs.org/jsesc/-/jsesc-0.5.0.tgz",
                     "integrity": "sha1-597mbjXW/Bb3EP6R1c9p9w8IkR0=",
                     "dev": true
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@@ -8571,7 +8585,7 @@
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         "strip-ansi": {
             "version": "3.0.1",
-            "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": {