diff --git a/package-lock.json b/package-lock.json
index b46c72f..a033062 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -4,24 +4,50 @@
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   "requires": true,
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+      "dev": true,
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-      "resolved": "http://registry.npmjs.org/@sinonjs/formatio/-/formatio-2.0.0.tgz",
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+      "resolved": "https://registry.npmjs.org/@sinonjs/formatio/-/formatio-3.2.1.tgz",
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       "dev": true,
       "requires": {
-        "samsam": "1.3.0"
+        "@sinonjs/commons": "^1",
+        "@sinonjs/samsam": "^3.1.0"
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-      "resolved": "https://registry.npmjs.org/@sinonjs/samsam/-/samsam-2.1.0.tgz",
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+      "resolved": "https://registry.npmjs.org/@sinonjs/samsam/-/samsam-3.3.2.tgz",
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       "dev": true,
       "requires": {
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+        "@sinonjs/commons": "^1.0.2",
+        "array-from": "^2.1.1",
+        "lodash": "^4.17.11"
+      },
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+          "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.15.tgz",
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+          "dev": true
+        }
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+    "@sinonjs/text-encoding": {
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+      "resolved": "https://registry.npmjs.org/@sinonjs/text-encoding/-/text-encoding-0.7.1.tgz",
+      "integrity": "sha512-+iTbntw2IZPb/anVDbypzfQa+ay64MW0Zo8aJ8gZPWMMK6/OubMVb6lUPMagqjOPnmtauXnFCACVl3O7ogjeqQ==",
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@@ -128,6 +154,7 @@
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       "dev": true,
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@@ -388,7 +416,7 @@
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+          "resolved": "https://registry.npmjs.org/follow-redirects/-/follow-redirects-1.0.0.tgz",
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@@ -2225,6 +2263,7 @@
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@@ -2239,6 +2278,7 @@
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@@ -2246,12 +2286,14 @@
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+          "optional": true
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@@ -2270,6 +2312,7 @@
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@@ -2350,7 +2393,8 @@
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@@ -2362,6 +2406,7 @@
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@@ -2447,7 +2492,8 @@
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@@ -2483,6 +2529,7 @@
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@@ -2545,12 +2593,14 @@
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+          "optional": true
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-      "dev": true
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-        "text-encoding": "^0.6.4"
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-      "resolved": "http://registry.npmjs.org/sinon/-/sinon-4.5.0.tgz",
-      "integrity": "sha512-trdx+mB0VBBgoYucy6a9L7/jfQOmvGeaKZT4OOJ+lPAtI8623xyGr8wLiE4eojzBS8G9yXbhx42GHUOVLr4X2w==",
-      "dev": true,
-      "requires": {
-        "@sinonjs/formatio": "^2.0.0",
-        "diff": "^3.1.0",
-        "lodash.get": "^4.4.2",
-        "lolex": "^2.2.0",
-        "nise": "^1.2.0",
-        "supports-color": "^5.1.0",
-        "type-detect": "^4.0.5"
+      "version": "7.4.1",
+      "resolved": "http://registry.npmjs.org/sinon/-/sinon-7.4.1.tgz",
+      "integrity": "sha512-7s9buHGHN/jqoy/v4bJgmt0m1XEkCEd/tqdHXumpBp0JSujaT4Ng84JU5wDdK4E85ZMq78NuDe0I3NAqXY8TFg==",
+      "dev": true,
+      "requires": {
+        "@sinonjs/commons": "^1.4.0",
+        "@sinonjs/formatio": "^3.2.1",
+        "@sinonjs/samsam": "^3.3.2",
+        "diff": "^3.5.0",
+        "lolex": "^4.2.0",
+        "nise": "^1.5.1",
+        "supports-color": "^5.5.0"
       },
       "dependencies": {
         "supports-color": {
@@ -5058,13 +5103,15 @@
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       "resolved": "https://registry.npmjs.org/smart-buffer/-/smart-buffer-4.0.1.tgz",
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-      "dev": true
+      "dev": true,
+      "optional": true
     },
     "smtp-connection": {
       "version": "2.12.0",
       "resolved": "https://registry.npmjs.org/smtp-connection/-/smtp-connection-2.12.0.tgz",
       "integrity": "sha1-1275EnyyPCJZ7bHoNJwujV4tdME=",
       "dev": true,
+      "optional": true,
       "requires": {
         "httpntlm": "1.6.1",
         "nodemailer-shared": "1.1.0"
@@ -5274,6 +5321,7 @@
       "resolved": "https://registry.npmjs.org/socks/-/socks-2.2.1.tgz",
       "integrity": "sha512-0GabKw7n9mI46vcNrVfs0o6XzWzjVa3h6GaSo2UPxtWAROXUWavfJWh1M4PR5tnE0dcnQXZIDFP4yrAysLze/w==",
       "dev": true,
+      "optional": true,
       "requires": {
         "ip": "^1.1.5",
         "smart-buffer": "^4.0.1"
@@ -5284,6 +5332,7 @@
       "resolved": "https://registry.npmjs.org/socks-proxy-agent/-/socks-proxy-agent-4.0.1.tgz",
       "integrity": "sha512-Kezx6/VBguXOsEe5oU3lXYyKMi4+gva72TwJ7pQY5JfqUx2nMk7NXA6z/mpNqIlfQjWYVfeuNvQjexiTaTn6Nw==",
       "dev": true,
+      "optional": true,
       "requires": {
         "agent-base": "~4.2.0",
         "socks": "~2.2.0"
@@ -5439,12 +5488,6 @@
       "dev": true,
       "optional": true
     },
-    "text-encoding": {
-      "version": "0.6.4",
-      "resolved": "https://registry.npmjs.org/text-encoding/-/text-encoding-0.6.4.tgz",
-      "integrity": "sha1-45mpgiV6J22uQou5KEXLcb3CbRk=",
-      "dev": true
-    },
     "throttleit": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/throttleit/-/throttleit-1.0.0.tgz",
@@ -5618,6 +5661,7 @@
       "resolved": "https://registry.npmjs.org/type-check/-/type-check-0.3.2.tgz",
       "integrity": "sha1-WITKtRLPHTVeP7eE8wgEsrUg23I=",
       "dev": true,
+      "optional": true,
       "requires": {
         "prelude-ls": "~1.1.2"
       }
@@ -5676,7 +5720,8 @@
       "version": "1.7.0",
       "resolved": "https://registry.npmjs.org/underscore/-/underscore-1.7.0.tgz",
       "integrity": "sha1-a7rwh3UA02vjTsqlhODbn+8DUgk=",
-      "dev": true
+      "dev": true,
+      "optional": true
     },
     "union-value": {
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diff --git a/package.json b/package.json
index 3f9e698..35d2021 100644
--- a/package.json
+++ b/package.json
@@ -53,7 +53,7 @@
     "karma-phantomjs-launcher": "^1.0.2",
     "karma-sinon": "^1.0.5",
     "mocha": "^5.2.0",
-    "sinon": "^4.5.0",
+    "sinon": "^7.4.1",
     "supertest": "^3.3.0"
   }
 }