diff --git a/package-lock.json b/package-lock.json
index a10a761..5b661ce 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -376,15 +376,15 @@
       }
     },
     "@semantic-release/npm": {
-      "version": "5.1.7",
-      "resolved": "https://registry.npmjs.org/@semantic-release/npm/-/npm-5.1.7.tgz",
-      "integrity": "sha512-4THiFGp9APX1a+EJJsOYurJCR8TrRUgNCU9u46AkZekWfvtyzacfIBKCrmEljpYG8qDDnHLZwHSqyW4ID4iteA==",
+      "version": "5.1.9",
+      "resolved": "https://registry.npmjs.org/@semantic-release/npm/-/npm-5.1.9.tgz",
+      "integrity": "sha512-Hcwhiu7zC0hD0ZPTkEE5bsK9l0z7Ou+N/mcSpYT1kq96ETMQtyZee0gjxXiAGaIHJ7wlMuUhHbYp7iAaI1965w==",
       "dev": true,
       "requires": {
         "@semantic-release/error": "^2.2.0",
         "aggregate-error": "^3.0.0",
         "execa": "^1.0.0",
-        "fs-extra": "^7.0.0",
+        "fs-extra": "^8.0.0",
         "lodash": "^4.17.4",
         "nerf-dart": "^1.0.0",
         "normalize-url": "^4.0.0",
@@ -394,17 +394,6 @@
         "registry-auth-token": "^3.3.1"
       },
       "dependencies": {
-        "fs-extra": {
-          "version": "7.0.1",
-          "resolved": "https://registry.npmjs.org/fs-extra/-/fs-extra-7.0.1.tgz",
-          "integrity": "sha512-YJDaCJZEnBmcbw13fvdAM9AwNOJwOzrE4pqMqBq5nFiEqXUqHwlK4B+3pUw6JNvfSPtX05xFHtYy/1ni01eGCw==",
-          "dev": true,
-          "requires": {
-            "graceful-fs": "^4.1.2",
-            "jsonfile": "^4.0.0",
-            "universalify": "^0.1.0"
-          }
-        },
         "read-pkg": {
           "version": "5.1.1",
           "resolved": "https://registry.npmjs.org/read-pkg/-/read-pkg-5.1.1.tgz",
@@ -1620,6 +1609,7 @@
         "@types/bip39": "^2.4.2",
         "@types/chai": "^4.1.7",
         "@types/mocha": "^5.2.6",
+        "@types/node": "^10.11.7",
         "@types/randombytes": "^2.0.0",
         "@types/sinon": "^7.0.11",
         "@types/wif": "^2.0.1",
@@ -1652,6 +1642,11 @@
         "wif": "^2.0.6"
       },
       "dependencies": {
+        "@types/node": {
+          "version": "10.14.8",
+          "resolved": "https://registry.npmjs.org/@types/node/-/node-10.14.8.tgz",
+          "integrity": "sha512-I4+DbJEhLEg4/vIy/2gkWDvXBOOtPKV9EnLhYjMoqxcRW+TTZtUftkHktz/a8suoD5mUL7m6ReLrkPvSsCQQmw=="
+        },
         "axios": {
           "version": "0.18.0",
           "resolved": "https://registry.npmjs.org/axios/-/axios-0.18.0.tgz",
@@ -14682,6 +14677,7 @@
       "requires": {
         "axios": "^0.17.1",
         "babel-register": "^6.26.0",
+        "bignumber.js": "^8.0.2",
         "bitbox-sdk": "8.1.1",
         "chalk": "^2.3.0",
         "clear": "0.1.0",
@@ -14704,6 +14700,11 @@
             "is-buffer": "^1.1.5"
           }
         },
+        "bignumber.js": {
+          "version": "8.1.1",
+          "resolved": "https://registry.npmjs.org/bignumber.js/-/bignumber.js-8.1.1.tgz",
+          "integrity": "sha512-QD46ppGintwPGuL1KqmwhR0O+N2cZUg8JG/VzwI2e28sM9TqHjQB10lI4QAaMHVbLzwVLLAwEglpKPViWX+5NQ=="
+        },
         "clear": {
           "version": "0.1.0",
           "resolved": "https://registry.npmjs.org/clear/-/clear-0.1.0.tgz",
@@ -14717,6 +14718,7 @@
             "@types/lodash": "^4.14.120",
             "axios": "^0.18.0",
             "bchaddrjs-slp": "git://github.com/simpleledger/bchaddrjs.git#master",
+            "bignumber.js": "^8.1.1",
             "bitcore-lib-cash": "^0.19.0",
             "lodash": "^4.17.11"
           },
@@ -14742,6 +14744,7 @@
         "@types/lodash": "^4.14.120",
         "axios": "^0.18.0",
         "bchaddrjs-slp": "git://github.com/simpleledger/bchaddrjs.git#master",
+        "bignumber.js": "^8.1.1",
         "bitcore-lib-cash": "^0.19.0",
         "lodash": "^4.17.11"
       },
@@ -14754,6 +14757,11 @@
             "follow-redirects": "^1.3.0",
             "is-buffer": "^1.1.5"
           }
+        },
+        "bignumber.js": {
+          "version": "8.1.1",
+          "resolved": "https://registry.npmjs.org/bignumber.js/-/bignumber.js-8.1.1.tgz",
+          "integrity": "sha512-QD46ppGintwPGuL1KqmwhR0O+N2cZUg8JG/VzwI2e28sM9TqHjQB10lI4QAaMHVbLzwVLLAwEglpKPViWX+5NQ=="
         }
       }
     },