diff --git a/package-lock.json b/package-lock.json
index 1e9a3c6..2143b1f 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -4,6 +4,178 @@
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         "xhr": "^2.2.0",
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+      "resolved": "https://registry.npmjs.org/webidl-conversions/-/webidl-conversions-3.0.1.tgz",
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-      "resolved": "http://registry.npmjs.org/whatwg-fetch/-/whatwg-fetch-2.0.4.tgz",
+      "resolved": "https://registry.npmjs.org/whatwg-fetch/-/whatwg-fetch-2.0.4.tgz",
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+      "resolved": "https://registry.npmjs.org/whatwg-url/-/whatwg-url-5.0.0.tgz",
+      "integrity": "sha512-saE57nupxk6v3HY35+jzBwYa0rKSy0XR8JSxZPwgLr7ys0IBzhGviA1/TUGJLmSVqs8pb9AnvICXEuOHLprYTw==",
+      "requires": {
+        "tr46": "~0.0.3",
+        "webidl-conversions": "^3.0.0"
+      }
+    },
+    "which-boxed-primitive": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/which-boxed-primitive/-/which-boxed-primitive-1.0.2.tgz",
+      "integrity": "sha512-bwZdv0AKLpplFY2KZRX6TvyuN7ojjr7lwkg6ml0roIy9YeuSr7JS372qlNW18UQYzgYK9ziGcerWqZOmEn9VNg==",
+      "dev": true,
+      "requires": {
+        "is-bigint": "^1.0.1",
+        "is-boolean-object": "^1.1.0",
+        "is-number-object": "^1.0.4",
+        "is-string": "^1.0.5",
+        "is-symbol": "^1.0.3"
+      }
+    },
     "which-module": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/which-module/-/which-module-1.0.0.tgz",
-      "integrity": "sha1-u6Y8qGGUiZT/MHc2CJ47lgJsKk8="
+      "integrity": "sha1-u6Y8qGGUiZT/MHc2CJ47lgJsKk8=",
+      "dev": true
+    },
+    "which-typed-array": {
+      "version": "1.1.14",
+      "resolved": "https://registry.npmjs.org/which-typed-array/-/which-typed-array-1.1.14.tgz",
+      "integrity": "sha512-VnXFiIW8yNn9kIHN88xvZ4yOWchftKDsRJ8fEPacX/wl1lOvBrhsJ/OeJCXq7B0AaijRuqgzSKalJoPk+D8MPg==",
+      "dev": true,
+      "requires": {
+        "available-typed-arrays": "^1.0.6",
+        "call-bind": "^1.0.5",
+        "for-each": "^0.3.3",
+        "gopd": "^1.0.1",
+        "has-tostringtag": "^1.0.1"
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     "window-size": {
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       "resolved": "https://registry.npmjs.org/window-size/-/window-size-0.2.0.tgz",
-      "integrity": "sha1-tDFbtCFKPXBY6+7okuE/ok2YsHU="
+      "integrity": "sha1-tDFbtCFKPXBY6+7okuE/ok2YsHU=",
+      "dev": true
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     "wrap-ansi": {
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       "integrity": "sha1-2Pw9KE3QV5T+hJc8rs3Rz4JP3YU=",
+      "dev": true,
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@@ -3319,7 +4636,8 @@
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-      "integrity": "sha1-tSQ9jz7BqjXxNkYFvA0QNuMKtp8="
+      "integrity": "sha1-tSQ9jz7BqjXxNkYFvA0QNuMKtp8=",
+      "dev": true
     },
     "ws": {
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@@ -3330,11 +4648,11 @@
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-      "resolved": "https://registry.npmjs.org/xhr/-/xhr-2.5.0.tgz",
-      "integrity": "sha512-4nlO/14t3BNUZRXIXfXe+3N6w3s1KoxcJUUURctd64BLRe67E4gRwp4PjywtDY72fXpZ1y6Ch0VZQRY/gMPzzQ==",
+      "version": "2.6.0",
+      "resolved": "https://registry.npmjs.org/xhr/-/xhr-2.6.0.tgz",
+      "integrity": "sha512-/eCGLb5rxjx5e3mF1A7s+pLlR6CGyqWN91fv1JgER5mVWg1MZmlhBvy9kjcsOdRk8RrIujotWyJamfyrp+WIcA==",
       "requires": {
-        "global": "~4.3.0",
+        "global": "~4.4.0",
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         "parse-headers": "^2.0.0",
         "xtend": "^4.0.0"
@@ -3352,19 +4670,26 @@
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-      "version": "4.0.1",
-      "resolved": "https://registry.npmjs.org/xtend/-/xtend-4.0.1.tgz",
-      "integrity": "sha1-pcbVMr5lbiPbgg77lDofBJmNY68="
+      "version": "4.0.2",
+      "resolved": "https://registry.npmjs.org/xtend/-/xtend-4.0.2.tgz",
+      "integrity": "sha512-LKYU1iAXJXUgAXn9URjiu+MWhyUXHsvfp7mcuYm9dSUKK0/CjtrUwFAxD82/mCWbtLsGjFIad0wIsod4zrTAEQ=="
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     "y18n": {
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       "resolved": "https://registry.npmjs.org/y18n/-/y18n-3.2.1.tgz",
-      "integrity": "sha1-bRX7qITAhnnA136I53WegR4H+kE="
+      "integrity": "sha1-bRX7qITAhnnA136I53WegR4H+kE=",
+      "dev": true
+    },
+    "yallist": {
+      "version": "3.1.1",
+      "resolved": "https://registry.npmjs.org/yallist/-/yallist-3.1.1.tgz",
+      "integrity": "sha512-a4UGQaWPH59mOXUYnAG2ewncQS4i4F43Tv3JoAM+s2VDAmS9NsK8GpDMLrCHPksFT7h3K6TOoUNn2pb7RoXx4g=="
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     "yargs": {
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       "resolved": "https://registry.npmjs.org/yargs/-/yargs-4.8.1.tgz",
       "integrity": "sha1-wMQpJMpKqmsObaFznfshZDn53cA=",
+      "dev": true,
       "requires": {
         "cliui": "^3.2.0",
         "decamelize": "^1.1.1",
@@ -3386,6 +4711,7 @@
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       "integrity": "sha1-hVaN488VD/SfpRgl8DqMiA3cxcQ=",
+      "dev": true,
       "requires": {
         "camelcase": "^3.0.0",
         "lodash.assign": "^4.0.6"
diff --git a/package.json b/package.json
index a33de8e..86afcb1 100644
--- a/package.json
+++ b/package.json
@@ -38,7 +38,7 @@
     "bluebird": "^3.5.1",
     "ethereumjs-util": "^5.1.5",
     "ethers": "^3.0.15",
-    "web3-provider-engine": "^14.0.6",
+    "web3-provider-engine": "^16.0.1",
     "zeppelin-solidity": "1.8.0"
   },
   "devDependencies": {