diff --git a/backend/package-lock.json b/backend/package-lock.json
index c4e0351..866d168 100644
--- a/backend/package-lock.json
+++ b/backend/package-lock.json
@@ -234,14 +234,6 @@
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       "integrity": "sha1-r2rId6Jcx/dOBYiUdThY39sk/bY="
     },
-    "async": {
-      "version": "2.6.1",
-      "resolved": "https://registry.npmjs.org/async/-/async-2.6.1.tgz",
-      "integrity": "sha512-fNEiL2+AZt6AlAw/29Cr0UDe4sRAHCpEHh54WMz+Bb7QfNcFw4h3loofyJpLeQs4Yx7yuqu/2dLgM5hKOs6HlQ==",
-      "requires": {
-        "lodash": "^4.17.10"
-      }
-    },
     "asynckit": {
       "version": "0.4.0",
       "resolved": "https://registry.npmjs.org/asynckit/-/asynckit-0.4.0.tgz",
@@ -1417,9 +1409,9 @@
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     "kareem": {
-      "version": "2.3.0",
-      "resolved": "https://registry.npmjs.org/kareem/-/kareem-2.3.0.tgz",
-      "integrity": "sha512-6hHxsp9e6zQU8nXsP+02HGWXwTkOEw6IROhF2ZA28cYbUk4eJ6QbtZvdqZOdD9YPKghG3apk5eOCvs+tLl3lRg=="
+      "version": "2.3.1",
+      "resolved": "https://registry.npmjs.org/kareem/-/kareem-2.3.1.tgz",
+      "integrity": "sha512-l3hLhffs9zqoDe8zjmb/mAN4B8VT3L56EUvKNqLFVs9YlFA+zx7ke1DO8STAdDyYNkeSo1nKmjuvQeI12So8Xw=="
     },
     "latest-version": {
       "version": "3.1.0",
@@ -1467,7 +1459,8 @@
     "lodash": {
       "version": "4.17.11",
       "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.11.tgz",
-      "integrity": "sha512-cQKh8igo5QUhZ7lg38DYWAxMvjSAKG0A8wGSVimP07SIUEK2UO+arSRKbRZWtelMtN5V0Hkwh5ryOto/SshYIg=="
+      "integrity": "sha512-cQKh8igo5QUhZ7lg38DYWAxMvjSAKG0A8wGSVimP07SIUEK2UO+arSRKbRZWtelMtN5V0Hkwh5ryOto/SshYIg==",
+      "dev": true
     },
     "lodash.includes": {
       "version": "4.3.0",
@@ -1753,28 +1746,37 @@
       }
     },
     "mongoose": {
-      "version": "5.4.19",
-      "resolved": "https://registry.npmjs.org/mongoose/-/mongoose-5.4.19.tgz",
-      "integrity": "sha512-paRU3nbCrPIUVw1GAlxo11uIIqrYORctUx1kcLj7i2NhkxPQuy5OK2/FYj8+tglsaixycmONSyop2HQp1IUQSA==",
-      "requires": {
-        "async": "2.6.1",
-        "bson": "~1.1.0",
-        "kareem": "2.3.0",
-        "mongodb": "3.1.13",
-        "mongodb-core": "3.1.11",
+      "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": "0.5.1",
-        "mquery": "3.2.0",
-        "ms": "2.1.1",
-        "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": {
+        "mongodb": {
+          "version": "3.3.2",
+          "resolved": "https://registry.npmjs.org/mongodb/-/mongodb-3.3.2.tgz",
+          "integrity": "sha512-fqJt3iywelk4yKu/lfwQg163Bjpo5zDKhXiohycvon4iQHbrfflSAz9AIlRE6496Pm/dQKQK5bMigdVo2s6gBg==",
+          "requires": {
+            "bson": "^1.1.1",
+            "require_optional": "^1.0.1",
+            "safe-buffer": "^5.1.2"
+          }
+        },
         "ms": {
-          "version": "2.1.1",
-          "resolved": "https://registry.npmjs.org/ms/-/ms-2.1.1.tgz",
-          "integrity": "sha512-tgp+dl5cGk28utYktBsrFqA7HKgrhgPsg6Z/EfhWI4gl1Hwq8B/GmY/0oXZ6nF8hDVesS/FpnYaD/kOWhYQvyg=="
+          "version": "2.1.2",
+          "resolved": "https://registry.npmjs.org/ms/-/ms-2.1.2.tgz",
+          "integrity": "sha512-sGkPx+VjMtmA6MX27oA4FBFELFCZZ4S4XqeGOXCv68tT+jb3vk/RyaKWP0PTKyWtmLSM0b+adUTEvbs1PEaH2w=="
         }
       }
     },
@@ -1784,18 +1786,18 @@
       "integrity": "sha512-Yo/7qQU4/EyIS8YDFSeenIvXxZN+ld7YdV9LqFVQJzTLye8unujAWPZ4NWKfFA+RNjh+wvTWKY9Z3E5XM6ZZiQ=="
     },
     "mpath": {
-      "version": "0.5.1",
-      "resolved": "https://registry.npmjs.org/mpath/-/mpath-0.5.1.tgz",
-      "integrity": "sha512-H8OVQ+QEz82sch4wbODFOz+3YQ61FYz/z3eJ5pIdbMEaUzDqA268Wd+Vt4Paw9TJfvDgVKaayC0gBzMIw2jhsg=="
+      "version": "0.6.0",
+      "resolved": "https://registry.npmjs.org/mpath/-/mpath-0.6.0.tgz",
+      "integrity": "sha512-i75qh79MJ5Xo/sbhxrDrPSEG0H/mr1kcZXJ8dH6URU5jD/knFxCVqVC/gVSW7GIXL/9hHWlT9haLbCXWOll3qw=="
     },
     "mquery": {
-      "version": "3.2.0",
-      "resolved": "https://registry.npmjs.org/mquery/-/mquery-3.2.0.tgz",
-      "integrity": "sha512-qPJcdK/yqcbQiKoemAt62Y0BAc0fTEKo1IThodBD+O5meQRJT/2HSe5QpBNwaa4CjskoGrYWsEyjkqgiE0qjhg==",
+      "version": "3.2.2",
+      "resolved": "https://registry.npmjs.org/mquery/-/mquery-3.2.2.tgz",
+      "integrity": "sha512-XB52992COp0KP230I3qloVUbkLUxJIu328HBP2t2EsxSFtf4W1HPSOBWOXf1bqxK4Xbb66lfMJ+Bpfd9/yZE1Q==",
       "requires": {
         "bluebird": "3.5.1",
         "debug": "3.1.0",
-        "regexp-clone": "0.0.1",
+        "regexp-clone": "^1.0.0",
         "safe-buffer": "5.1.2",
         "sliced": "1.0.1"
       },
@@ -2230,9 +2232,9 @@
       }
     },
     "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=="
     },
     "registry-auth-token": {
       "version": "3.4.0",
@@ -2387,6 +2389,11 @@
       "integrity": "sha1-2kL0l0DAtC2yypcoVxyxkMmO/qM=",
       "dev": true
     },
+    "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 cbdf5cb..23d10ca 100644
--- a/backend/package.json
+++ b/backend/package.json
@@ -44,7 +44,7 @@
     "jsonwebtoken": "^8.4.0",
     "mime-types": "^2.1.22",
     "mongodb": "^3.1.13",
-    "mongoose": "^5.4.19",
+    "mongoose": "^5.7.5",
     "multer": "^1.4.1",
     "ts-node": "^8.0.2",
     "tsc": "^1.20150623.0",