diff --git a/package-lock.json b/package-lock.json
index 596d78a..803e7c8 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -58,6 +58,12 @@
       "integrity": "sha1-2Klr13/Wjfd5OnMDajug1UBdR3s=",
       "dev": true
     },
+    "data-uri-to-buffer": {
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/data-uri-to-buffer/-/data-uri-to-buffer-4.0.0.tgz",
+      "integrity": "sha512-Vr3mLBA8qWmcuschSLAOogKgQ/Jwxulv3RNE4FXnYWRGujzrRWQI4m12fQqRkwX06C0KanhLr4hK+GydchZsaA==",
+      "dev": true
+    },
     "debug": {
       "version": "2.2.0",
       "resolved": "https://registry.npmjs.org/debug/-/debug-2.2.0.tgz",
@@ -90,21 +96,31 @@
       "integrity": "sha1-fyjS657nsVqX79ic5j3P2qPMur8=",
       "dev": true
     },
-    "encoding": {
-      "version": "0.1.13",
-      "resolved": "https://registry.npmjs.org/encoding/-/encoding-0.1.13.tgz",
-      "integrity": "sha512-ETBauow1T35Y/WZMkio9jiM0Z5xjHHmJ4XmjZOq1l/dXz3lr2sRn87nJy20RupqSh1F2m3HHPSp8ShIPQJrJ3A==",
-      "dev": true,
-      "requires": {
-        "iconv-lite": "^0.6.2"
-      }
-    },
     "escape-string-regexp": {
       "version": "1.0.5",
       "resolved": "https://registry.npmjs.org/escape-string-regexp/-/escape-string-regexp-1.0.5.tgz",
       "integrity": "sha1-G2HAViGQqN/2rjuyzwIAyhMLhtQ=",
       "dev": true
     },
+    "fetch-blob": {
+      "version": "3.1.4",
+      "resolved": "https://registry.npmjs.org/fetch-blob/-/fetch-blob-3.1.4.tgz",
+      "integrity": "sha512-Eq5Xv5+VlSrYWEqKrusxY1C3Hm/hjeAsCGVG3ft7pZahlUAChpGZT/Ms1WmSLnEAisEXszjzu/s+ce6HZB2VHA==",
+      "dev": true,
+      "requires": {
+        "node-domexception": "^1.0.0",
+        "web-streams-polyfill": "^3.0.3"
+      }
+    },
+    "formdata-polyfill": {
+      "version": "4.0.10",
+      "resolved": "https://registry.npmjs.org/formdata-polyfill/-/formdata-polyfill-4.0.10.tgz",
+      "integrity": "sha512-buewHzMvYL29jdeQTVILecSaZKnt/RJWjoZCF5OW60Z67/GmSLBkOFM7qh1PI3zFNtJbaZL5eQu1vLfazOwj4g==",
+      "dev": true,
+      "requires": {
+        "fetch-blob": "^3.1.2"
+      }
+    },
     "fs.realpath": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/fs.realpath/-/fs.realpath-1.0.0.tgz",
@@ -148,15 +164,6 @@
       "resolved": "https://registry.npmjs.org/http-https/-/http-https-1.0.0.tgz",
       "integrity": "sha1-L5CN1fHbQGjAWM1ubUzjkskTOJs="
     },
-    "iconv-lite": {
-      "version": "0.6.2",
-      "resolved": "https://registry.npmjs.org/iconv-lite/-/iconv-lite-0.6.2.tgz",
-      "integrity": "sha512-2y91h5OpQlolefMPmUlivelittSWy0rP+oYVpn6A7GwVHNE8AWzoYOBNmlwks3LobaJxgHCYZAnyNo2GgpNRNQ==",
-      "dev": true,
-      "requires": {
-        "safer-buffer": ">= 2.1.2 < 3.0.0"
-      }
-    },
     "inflight": {
       "version": "1.0.6",
       "resolved": "https://registry.npmjs.org/inflight/-/inflight-1.0.6.tgz",
@@ -173,12 +180,6 @@
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       "dev": true
     },
-    "is-stream": {
-      "version": "1.1.0",
-      "resolved": "https://registry.npmjs.org/is-stream/-/is-stream-1.1.0.tgz",
-      "integrity": "sha1-EtSj3U5o4Lec6428hBc66A2RykQ=",
-      "dev": true
-    },
     "json3": {
       "version": "3.3.2",
       "resolved": "https://registry.npmjs.org/json3/-/json3-3.3.2.tgz",
@@ -302,14 +303,21 @@
       "integrity": "sha1-nNE8A62/8ltl7/3nzoZO6VIBcJg=",
       "dev": true
     },
+    "node-domexception": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/node-domexception/-/node-domexception-1.0.0.tgz",
+      "integrity": "sha512-/jKZoMpw0F8GRwl4/eLROPA3cfcXtLApP0QzLmUT/HuPCZWyB7IY9ZrMeKw2O/nFIqPQB3PVM9aYm0F312AXDQ==",
+      "dev": true
+    },
     "node-fetch": {
-      "version": "1.6.3",
-      "resolved": "https://registry.npmjs.org/node-fetch/-/node-fetch-1.6.3.tgz",
-      "integrity": "sha1-3CNO3WSJmC1Y6PDbT2lQKavNjAQ=",
+      "version": "3.1.1",
+      "resolved": "https://registry.npmjs.org/node-fetch/-/node-fetch-3.1.1.tgz",
+      "integrity": "sha512-SMk+vKgU77PYotRdWzqZGTZeuFKlsJ0hu4KPviQKkfY+N3vn2MIzr0rvpnYpR8MtB3IEuhlEcuOLbGvLRlA+yg==",
       "dev": true,
       "requires": {
-        "encoding": "^0.1.11",
-        "is-stream": "^1.0.1"
+        "data-uri-to-buffer": "^4.0.0",
+        "fetch-blob": "^3.1.3",
+        "formdata-polyfill": "^4.0.10"
       }
     },
     "oboe": {
@@ -335,12 +343,6 @@
       "integrity": "sha1-F0uSaHNVNP+8es5r9TpanhtcX18=",
       "dev": true
     },
-    "safer-buffer": {
-      "version": "2.1.2",
-      "resolved": "https://registry.npmjs.org/safer-buffer/-/safer-buffer-2.1.2.tgz",
-      "integrity": "sha512-YZo3K82SD7Riyi0E1EQPojLz7kpepnSQI9IyPbHHg1XXXevb5dJI7tpyN2ADxGcQbHG7vcyRHk0cbwqcQriUtg==",
-      "dev": true
-    },
     "supports-color": {
       "version": "3.1.2",
       "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-3.1.2.tgz",
@@ -361,6 +363,12 @@
       "resolved": "https://registry.npmjs.org/ultron/-/ultron-1.1.1.tgz",
       "integrity": "sha512-UIEXBNeYmKptWH6z8ZnqTeS8fV74zG0/eRU9VGkpzz+LIJNs8W/zM/L+7ctCkRrgbNnnR0xxw4bKOr0cW0N0Og=="
     },
+    "web-streams-polyfill": {
+      "version": "3.2.0",
+      "resolved": "https://registry.npmjs.org/web-streams-polyfill/-/web-streams-polyfill-3.2.0.tgz",
+      "integrity": "sha512-EqPmREeOzttaLRm5HS7io98goBgZ7IVz79aDvqjD0kYXLtFZTc0T/U6wHTPKyIjb+MdN7DFIIX6hgdBEpWmfPA==",
+      "dev": true
+    },
     "wrappy": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/wrappy/-/wrappy-1.0.2.tgz",
diff --git a/package.json b/package.json
index e783040..c3dd5f2 100644
--- a/package.json
+++ b/package.json
@@ -25,6 +25,6 @@
   "devDependencies": {
     "chai": "3.5.0",
     "mocha": "3.2.0",
-    "node-fetch": "1.6.3"
+    "node-fetch": "3.1.1"
   }
 }