diff --git a/examples/exchange/package-lock.json b/examples/exchange/package-lock.json
index 7b1ad3c43..60671d177 100644
--- a/examples/exchange/package-lock.json
+++ b/examples/exchange/package-lock.json
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-        "create-hash": "^1.1.2",
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-        "nan": "^2.2.1",
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+        "elliptic": "^6.5.2",
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@@ -2414,6 +2687,23 @@
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+    "sodium-randbytes": {
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+      "resolved": "https://registry.npmjs.org/sodium-randbytes/-/sodium-randbytes-0.14.0.tgz",
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@@ -2648,6 +2938,11 @@
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@@ -2657,6 +2952,14 @@
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+      "version": "1.6.0",
+      "resolved": "https://registry.npmjs.org/unorm/-/unorm-1.6.0.tgz",
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       "integrity": "sha1-sr9O6FFKrmFltIF4KdIbLvSZBOw="
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+    "utf-8-validate": {
+      "version": "5.0.9",
+      "resolved": "https://registry.npmjs.org/utf-8-validate/-/utf-8-validate-5.0.9.tgz",
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+      "requires": {
+        "node-gyp-build": "^4.3.0"
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     "util-deprecate": {
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       "resolved": "https://registry.npmjs.org/util-deprecate/-/util-deprecate-1.0.2.tgz",
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+      "version": "3.10.0",
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@@ -2694,9 +3005,9 @@
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+      "version": "8.3.2",
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@@ -2713,6 +3024,19 @@
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       "integrity": "sha1-O+FF5YJxxzylUnndhR8SpoIRSws="
     },
+    "websocket": {
+      "version": "1.0.34",
+      "resolved": "https://registry.npmjs.org/websocket/-/websocket-1.0.34.tgz",
+      "integrity": "sha512-PRDso2sGwF6kM75QykIesBijKSVceR6jL2G8NGYyq2XrItNC2P5/qL5XeR056GhA+Ly7JMFvJb9I312mJfmqnQ==",
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+        "debug": "^2.2.0",
+        "es5-ext": "^0.10.50",
+        "typedarray-to-buffer": "^3.1.5",
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@@ -2756,6 +3080,11 @@
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       "integrity": "sha1-pcbVMr5lbiPbgg77lDofBJmNY68="
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+    "yaeti": {
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+      "resolved": "https://registry.npmjs.org/yaeti/-/yaeti-0.0.6.tgz",
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diff --git a/examples/exchange/package.json b/examples/exchange/package.json
index 2102995ba..bc4b22d27 100644
--- a/examples/exchange/package.json
+++ b/examples/exchange/package.json
@@ -17,7 +17,7 @@
   "license": "GPL-3.0",
   "dependencies": {
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     "body-parser": "^1.18.3",
     "bootstrap": "^4.3.1",
     "chalk": "^2.4.2",