diff --git a/backend/package-lock.json b/backend/package-lock.json
index 95532c6..70d58d6 100644
--- a/backend/package-lock.json
+++ b/backend/package-lock.json
@@ -112,14 +112,6 @@
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       "integrity": "sha1-8S4PPF13sLHN2RRpQuTpbB5N1SU="
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       "resolved": "https://registry.npmjs.org/async-limiter/-/async-limiter-1.0.0.tgz",
@@ -1276,20 +1268,15 @@
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-      "resolved": "https://registry.npmjs.org/kareem/-/kareem-2.0.5.tgz",
-      "integrity": "sha512-dfvpj3mCGJLZuADInhYrKaXkGarJxDqnTEiF91wK6fqwdCRmN+O4aEp8575UjZlQzDkzLI1WDL1uU7vyupURqw=="
+      "version": "2.3.1",
+      "resolved": "https://registry.npmjs.org/kareem/-/kareem-2.3.1.tgz",
+      "integrity": "sha512-l3hLhffs9zqoDe8zjmb/mAN4B8VT3L56EUvKNqLFVs9YlFA+zx7ke1DO8STAdDyYNkeSo1nKmjuvQeI12So8Xw=="
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-      "resolved": "https://registry.npmjs.org/lodash.get/-/lodash.get-4.4.2.tgz",
-      "integrity": "sha1-LRd/ZS+jHpObRDjVNBSZ36OCXpk="
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@@ -1403,38 +1390,65 @@
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-      "resolved": "https://registry.npmjs.org/mongodb/-/mongodb-3.0.4.tgz",
-      "integrity": "sha512-90YIIs7A4ko4kCGafxxXj3foexCAlJBC0YLwwIKgSLoE7Vni2IqUMz6HSsZ3zbXOfR1KWtxfnc0RyAMAY/ViLg==",
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-    "mongodb-core": {
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-      "resolved": "https://registry.npmjs.org/mongodb-core/-/mongodb-core-3.0.4.tgz",
-      "integrity": "sha512-OTH267FjfwBdEufSnrgd+u8HuLWRuQ6p8DR0XirPl2BdlLEMh4XwjJf1RTlruILp5p2m1w8dDC8rCxibC3W8qQ==",
+      "version": "3.3.2",
+      "resolved": "https://registry.npmjs.org/mongodb/-/mongodb-3.3.2.tgz",
+      "integrity": "sha512-fqJt3iywelk4yKu/lfwQg163Bjpo5zDKhXiohycvon4iQHbrfflSAz9AIlRE6496Pm/dQKQK5bMigdVo2s6gBg==",
       "requires": {
-        "bson": "1.0.5",
-        "require_optional": "1.0.1"
+        "bson": "^1.1.1",
+        "require_optional": "^1.0.1",
+        "safe-buffer": "^5.1.2"
+      },
+      "dependencies": {
+        "bson": {
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+          "resolved": "https://registry.npmjs.org/bson/-/bson-1.1.3.tgz",
+          "integrity": "sha512-TdiJxMVnodVS7r0BdL42y/pqC9cL2iKynVwA0Ho3qbsQYr428veL3l7BQyuqiw+Q5SqqoT0m4srSY/BlZ9AxXg=="
+        },
+        "safe-buffer": {
+          "version": "5.2.0",
+          "resolved": "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.2.0.tgz",
+          "integrity": "sha512-fZEwUGbVl7kouZs1jCdMLdt95hdIv0ZeHg6L7qPeciMZhZ+/gdesW4wgTARkrFWEpspjEATAzUGPG8N2jJiwbg=="
+        }
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     "mongoose": {
-      "version": "5.0.9",
-      "resolved": "https://registry.npmjs.org/mongoose/-/mongoose-5.0.9.tgz",
-      "integrity": "sha512-utGA97zd1R5NwRcqjhyPZP7sSExLQv9/KYAgFqtl6SRfp9vJXu5VPGwf6NdDRqUeh6e5v/tXVomkS2IPiSezxg==",
-      "requires": {
-        "async": "2.1.4",
-        "bson": "1.0.5",
-        "kareem": "2.0.5",
-        "lodash.get": "4.4.2",
-        "mongodb": "3.0.4",
+      "version": "5.7.5",
+      "resolved": "https://registry.npmjs.org/mongoose/-/mongoose-5.7.5.tgz",
+      "integrity": "sha512-BZ4FxtnbTurc/wcm/hLltLdI4IDxo4nsE0D9q58YymTdZwreNzwO62CcjVtaHhmr8HmJtOInp2W/T12FZaMf8g==",
+      "requires": {
+        "bson": "~1.1.1",
+        "kareem": "2.3.1",
+        "mongodb": "3.3.2",
         "mongoose-legacy-pluralize": "1.0.2",
-        "mpath": "0.3.0",
-        "mquery": "3.0.0",
-        "ms": "2.0.0",
-        "regexp-clone": "0.0.1",
+        "mpath": "0.6.0",
+        "mquery": "3.2.2",
+        "ms": "2.1.2",
+        "regexp-clone": "1.0.0",
+        "safe-buffer": "5.1.2",
+        "sift": "7.0.1",
         "sliced": "1.0.1"
+      },
+      "dependencies": {
+        "bson": {
+          "version": "1.1.3",
+          "resolved": "https://registry.npmjs.org/bson/-/bson-1.1.3.tgz",
+          "integrity": "sha512-TdiJxMVnodVS7r0BdL42y/pqC9cL2iKynVwA0Ho3qbsQYr428veL3l7BQyuqiw+Q5SqqoT0m4srSY/BlZ9AxXg=="
+        },
+        "mpath": {
+          "version": "0.6.0",
+          "resolved": "https://registry.npmjs.org/mpath/-/mpath-0.6.0.tgz",
+          "integrity": "sha512-i75qh79MJ5Xo/sbhxrDrPSEG0H/mr1kcZXJ8dH6URU5jD/knFxCVqVC/gVSW7GIXL/9hHWlT9haLbCXWOll3qw=="
+        },
+        "ms": {
+          "version": "2.1.2",
+          "resolved": "https://registry.npmjs.org/ms/-/ms-2.1.2.tgz",
+          "integrity": "sha512-sGkPx+VjMtmA6MX27oA4FBFELFCZZ4S4XqeGOXCv68tT+jb3vk/RyaKWP0PTKyWtmLSM0b+adUTEvbs1PEaH2w=="
+        },
+        "safe-buffer": {
+          "version": "5.1.2",
+          "resolved": "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.1.2.tgz",
+          "integrity": "sha512-Gd2UZBJDkXlY7GbJxfsE8/nvKkUEU1G38c1siN6QP6a9PT9MmHB8GnpscSmMJSoF8LOIrt8ud/wPtojys4G6+g=="
+        }
       }
     },
     "mongoose-hidden": {
@@ -1479,25 +1493,29 @@
       "integrity": "sha1-elj3iem1/TyUUgY0FXlg8mvV70Q="
     },
     "mquery": {
-      "version": "3.0.0",
-      "resolved": "https://registry.npmjs.org/mquery/-/mquery-3.0.0.tgz",
-      "integrity": "sha512-WL1Lk8v4l8VFSSwN3yCzY9TXw+fKVYKn6f+w86TRzOLSE8k1yTgGaLBPUByJQi8VcLbOdnUneFV/y3Kv874pnQ==",
+      "version": "3.2.2",
+      "resolved": "https://registry.npmjs.org/mquery/-/mquery-3.2.2.tgz",
+      "integrity": "sha512-XB52992COp0KP230I3qloVUbkLUxJIu328HBP2t2EsxSFtf4W1HPSOBWOXf1bqxK4Xbb66lfMJ+Bpfd9/yZE1Q==",
       "requires": {
-        "bluebird": "3.5.0",
-        "debug": "2.6.9",
-        "regexp-clone": "0.0.1",
-        "sliced": "0.0.5"
+        "bluebird": "3.5.1",
+        "debug": "3.1.0",
+        "regexp-clone": "^1.0.0",
+        "safe-buffer": "5.1.2",
+        "sliced": "1.0.1"
       },
       "dependencies": {
-        "bluebird": {
-          "version": "3.5.0",
-          "resolved": "https://registry.npmjs.org/bluebird/-/bluebird-3.5.0.tgz",
-          "integrity": "sha1-eRQg1/VR7qKJdFOop3ZT+WYG1nw="
+        "debug": {
+          "version": "3.1.0",
+          "resolved": "https://registry.npmjs.org/debug/-/debug-3.1.0.tgz",
+          "integrity": "sha512-OX8XqP7/1a9cqkxYw2yXss15f26NKWBpDXQd0/uK/KPqdQhxbPa994hnzjcE2VqQpDslf55723cKPUOGSmMY3g==",
+          "requires": {
+            "ms": "2.0.0"
+          }
         },
-        "sliced": {
-          "version": "0.0.5",
-          "resolved": "https://registry.npmjs.org/sliced/-/sliced-0.0.5.tgz",
-          "integrity": "sha1-XtwETKTrb3gW1Qui/GPiXY/kcH8="
+        "safe-buffer": {
+          "version": "5.1.2",
+          "resolved": "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.1.2.tgz",
+          "integrity": "sha512-Gd2UZBJDkXlY7GbJxfsE8/nvKkUEU1G38c1siN6QP6a9PT9MmHB8GnpscSmMJSoF8LOIrt8ud/wPtojys4G6+g=="
         }
       }
     },
@@ -1913,9 +1931,9 @@
       "integrity": "sha1-NXdOtzW/UPtsB46DM0tHI1AgfXk="
     },
     "regexp-clone": {
-      "version": "0.0.1",
-      "resolved": "https://registry.npmjs.org/regexp-clone/-/regexp-clone-0.0.1.tgz",
-      "integrity": "sha1-p8LgmJH9vzj7sQ03b7cwA+aKxYk="
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/regexp-clone/-/regexp-clone-1.0.0.tgz",
+      "integrity": "sha512-TuAasHQNamyyJ2hb97IuBEif4qBHGjPHBS64sZwytpLEqtBQ1gPJTnOaQ6qmpET16cK14kkjbazl6+p0RRv0yw=="
     },
     "request": {
       "version": "2.83.0",
@@ -2078,6 +2096,11 @@
       "resolved": "https://registry.npmjs.org/setprototypeof/-/setprototypeof-1.0.3.tgz",
       "integrity": "sha1-ZlZ+NwQ+608E2RvWWMDL77VbjgQ="
     },
+    "sift": {
+      "version": "7.0.1",
+      "resolved": "https://registry.npmjs.org/sift/-/sift-7.0.1.tgz",
+      "integrity": "sha512-oqD7PMJ+uO6jV9EQCl0LrRw1OwsiPsiFQR5AR30heR+4Dl7jBBbDLnNvWiak20tzZlSE1H7RB30SX/1j/YYT7g=="
+    },
     "signal-exit": {
       "version": "3.0.2",
       "resolved": "https://registry.npmjs.org/signal-exit/-/signal-exit-3.0.2.tgz",
diff --git a/backend/package.json b/backend/package.json
index 66ba8a8..70e333a 100644
--- a/backend/package.json
+++ b/backend/package.json
@@ -23,7 +23,7 @@
     "helmet": "^3.12.0",
     "jsonwebtoken": "^8.2.0",
     "moment": "^2.21.0",
-    "mongoose": "^5.0.9",
+    "mongoose": "^5.7.5",
     "mongoose-hidden": "^1.5.3",
     "morgan": "~1.9.0",
     "multer": "^1.3.0",