diff --git a/package-lock.json b/package-lock.json
index 095e0df..2e727cd 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -131,7 +131,7 @@
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@@ -725,14 +725,13 @@
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-            "resolved": "https://registry.npmjs.org/bitcoin-core/-/bitcoin-core-2.3.0.tgz",
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+            "version": "3.1.0",
+            "resolved": "https://registry.npmjs.org/bitcoin-core/-/bitcoin-core-3.1.0.tgz",
+            "integrity": "sha512-X6QzzxcN3mb1eIs75EwZSHKlL3zk9MthDksnBdTwvJdTJKZpAG3PsL81fjtXcL3NkMWttr7o32pjEcngM9qUGA==",
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-                "bluebird": "^3.4.1",
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-                "json-bigint": "^0.2.0",
+                "json-bigint": "^1.0.0",
                 "lodash": "^4.0.0",
                 "request": "^2.53.0",
                 "semver": "^5.1.0",
@@ -1036,12 +1035,12 @@
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-            "resolved": "https://registry.npmjs.org/bunyan/-/bunyan-1.8.12.tgz",
-            "integrity": "sha1-8VDw9nSKvdcq6uhPBEA74u8RN5c=",
+            "version": "1.8.15",
+            "resolved": "https://registry.npmjs.org/bunyan/-/bunyan-1.8.15.tgz",
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-                "moment": "^2.10.6",
+                "moment": "^2.19.3",
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@@ -1677,7 +1676,7 @@
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-            "integrity": "sha1-kDhtXrwsY1iPF/Jyvlwqk7dmXYM=",
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@@ -1695,9 +1694,9 @@
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-            "version": "0.2.0",
-            "resolved": "https://registry.npmjs.org/decode-uri-component/-/decode-uri-component-0.2.0.tgz",
-            "integrity": "sha1-6zkTMzRYd1y4TNGh+uBiEGu4dUU="
+            "version": "0.2.2",
+            "resolved": "https://registry.npmjs.org/decode-uri-component/-/decode-uri-component-0.2.2.tgz",
+            "integrity": "sha512-FqUYQ+8o158GyGTrMFJms9qh3CqTKvAqgqsTnkLI8sKu0028orqBhxNMFkFen0zGyg6epACD32pjVk58ngIErQ=="
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@@ -3464,7 +3463,7 @@
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-            "integrity": "sha1-DwiGD2oVUSey+t1PnOJLGqtuTSI=",
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@@ -4608,17 +4607,17 @@
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-            "resolved": "https://registry.npmjs.org/json-bigint/-/json-bigint-0.2.3.tgz",
-            "integrity": "sha1-EY1/b/HThlnxn5TPc+ZKdaP5iKg=",
+            "version": "1.0.0",
+            "resolved": "https://registry.npmjs.org/json-bigint/-/json-bigint-1.0.0.tgz",
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             "requires": {
-                "bignumber.js": "^4.0.0"
+                "bignumber.js": "^9.0.0"
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-                    "resolved": "https://registry.npmjs.org/bignumber.js/-/bignumber.js-4.1.0.tgz",
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+                    "version": "9.1.0",
+                    "resolved": "https://registry.npmjs.org/bignumber.js/-/bignumber.js-9.1.0.tgz",
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@@ -5337,7 +5336,7 @@
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-            "integrity": "sha1-rmzg1vbV4KT32JN5jQPB6pVZtqI=",
+            "integrity": "sha512-at/ZndSy3xEGJ8i0ygALh8ru9qy7gWW1cmkaqBN29JmMlIvM//MEO9y1sk/avxuwnPcfhkejkLsuPxH81BrkSg==",
             "optional": true,
             "requires": {
                 "mkdirp": "~0.5.1",
@@ -5377,7 +5376,7 @@
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             "resolved": "https://registry.npmjs.org/ncp/-/ncp-2.0.0.tgz",
-            "integrity": "sha1-GVoh1sRuNh0vsSgbo4uR6d9727M=",
+            "integrity": "sha512-zIdGUrPRFTUELUvr3Gmc7KZ2Sw/h1PiVM0Af/oHB6zgnV1ikqSfRk+TOufi79aHYCW3NiOXmr1BP5nWbzojLaA==",
             "optional": true
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@@ -6588,7 +6587,7 @@
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             "resolved": "https://registry.npmjs.org/rimraf/-/rimraf-2.4.5.tgz",
-            "integrity": "sha1-7nEM5dk6j9uFb7Xqj/Di11k0sto=",
+            "integrity": "sha512-J5xnxTyqaiw06JjMftq7L9ouA448dw/E7dKghkP9WpKNuwmARNNg+Gk8/u5ryb9N/Yo2+z3MCwuqFK/+qPOPfQ==",
             "optional": true,
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                 "glob": "^6.0.1"
@@ -7307,7 +7306,7 @@
         "standard-error": {
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             "resolved": "https://registry.npmjs.org/standard-error/-/standard-error-1.1.0.tgz",
-            "integrity": "sha1-I+UWj6HAggGJ5YEnAaeQWFENDTQ="
+            "integrity": "sha512-4v7qzU7oLJfMI5EltUSHCaaOd65J6S4BqKRWgzMi4EYaE5fvNabPxmAPGdxpGXqrcWjhDGI/H09CIdEuUOUeXg=="
         },
         "static-extend": {
             "version": "0.1.2",