diff --git a/package-lock.json b/package-lock.json
index 493dcbd..5fed5dc 100644
--- a/package-lock.json
+++ b/package-lock.json
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+          "resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-1.1.1.tgz",
+          "integrity": "sha512-n/ShnvDi6FHbbVfviro+WojiFzv+s8MPMHBczVePfUpDJLwoLT0ht1l4YwBCbi8pJAveEEdnkHyPyTP/mzRfwg==",
           "dev": true,
           "requires": {
-            "safe-buffer": "~5.0.1"
+            "safe-buffer": "~5.1.0"
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     "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==",
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     },
     "regexp.prototype.flags": {
@@ -2113,6 +2152,12 @@
         "es6-error": "^4.0.1"
       }
     },
+    "require-at": {
+      "version": "1.0.6",
+      "resolved": "https://registry.npmjs.org/require-at/-/require-at-1.0.6.tgz",
+      "integrity": "sha512-7i1auJbMUrXEAZCOQ0VNJgmcT2VOKPRl2YGJwgpHpC9CE91Mv4/4UYIUm4chGJaI381ZDq1JUicFii64Hapd8g==",
+      "dev": true
+    },
     "require-directory": {
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       "resolved": "https://registry.npmjs.org/require-directory/-/require-directory-2.1.1.tgz",
@@ -2125,16 +2170,6 @@
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-    "require_optional": {
-      "version": "1.0.1",
-      "resolved": "https://registry.npmjs.org/require_optional/-/require_optional-1.0.1.tgz",
-      "integrity": "sha512-qhM/y57enGWHAe3v/NcwML6a3/vfESLe/sGM2dII+gEO0BpKRUkWZow/tyloNqJyN6kXSl3RyyM8Ll5D/sJP8g==",
-      "dev": true,
-      "requires": {
-        "resolve-from": "^2.0.0",
-        "semver": "^5.1.0"
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       "resolved": "https://registry.npmjs.org/resolve/-/resolve-1.22.1.tgz",
@@ -2146,12 +2181,6 @@
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-    "resolve-from": {
-      "version": "2.0.0",
-      "resolved": "https://registry.npmjs.org/resolve-from/-/resolve-from-2.0.0.tgz",
-      "integrity": "sha1-lICrIOlP+h2egKgEx+oUdhGWa1c=",
-      "dev": true
-    },
     "rimraf": {
       "version": "2.7.1",
       "resolved": "https://registry.npmjs.org/rimraf/-/rimraf-2.7.1.tgz",
@@ -2184,6 +2213,16 @@
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       "dev": true
     },
+    "saslprep": {
+      "version": "1.0.3",
+      "resolved": "https://registry.npmjs.org/saslprep/-/saslprep-1.0.3.tgz",
+      "integrity": "sha512-/MY/PEMbk2SuY5sScONwhUDsV2p77Znkb/q3nSVstq/yQzYJOH/Azh29p9oJLsl3LnQwSvZDKagDGBsBwSooag==",
+      "dev": true,
+      "optional": true,
+      "requires": {
+        "sparse-bitfield": "^3.0.3"
+      }
+    },
     "semver": {
       "version": "5.3.0",
       "resolved": "https://registry.npmjs.org/semver/-/semver-5.3.0.tgz",
@@ -2260,6 +2299,12 @@
         "object-inspect": "^1.9.0"
       }
     },
+    "sift": {
+      "version": "13.5.2",
+      "resolved": "https://registry.npmjs.org/sift/-/sift-13.5.2.tgz",
+      "integrity": "sha512-+gxdEOMA2J+AI+fVsCqeNn7Tgx3M9ZN9jdi95939l1IJ8cZsqS8sqpJyOkic2SJk+1+98Uwryt/gL6XDaV+UZA==",
+      "dev": true
+    },
     "signal-exit": {
       "version": "3.0.2",
       "resolved": "https://registry.npmjs.org/signal-exit/-/signal-exit-3.0.2.tgz",
@@ -2281,7 +2326,7 @@
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       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/sliced/-/sliced-1.0.1.tgz",
-      "integrity": "sha1-CzpmK10Ewxd7GSa+qCsD+Dei70E=",
+      "integrity": "sha512-VZBmZP8WU3sMOZm1bdgTadsQbcscK0UM8oKxKVBs4XAhUo2Xxzm/OFMGBkPusxw9xL3Uy8LrzEqGqJhclsr0yA==",
       "dev": true
     },
     "source-map-support": {
@@ -2301,6 +2346,16 @@
         }
       }
     },
+    "sparse-bitfield": {
+      "version": "3.0.3",
+      "resolved": "https://registry.npmjs.org/sparse-bitfield/-/sparse-bitfield-3.0.3.tgz",
+      "integrity": "sha512-kvzhi7vqKTfkh0PZU+2D2PIllw2ymqJKujUcyPMd9Y75Nv4nPbGJZXNhxsgdQab2BmlDct1YnfQCguEvHr7VsQ==",
+      "dev": true,
+      "optional": true,
+      "requires": {
+        "memory-pager": "^1.0.2"
+      }
+    },
     "spawn-wrap": {
       "version": "1.4.3",
       "resolved": "https://registry.npmjs.org/spawn-wrap/-/spawn-wrap-1.4.3.tgz",
@@ -2630,8 +2685,8 @@
     },
     "util-deprecate": {
       "version": "1.0.2",
-      "resolved": false,
-      "integrity": "sha1-RQ1Nyfpw3nMnYvvS1KKJgUGaDM8=",
+      "resolved": "https://registry.npmjs.org/util-deprecate/-/util-deprecate-1.0.2.tgz",
+      "integrity": "sha512-EPD5q1uXyFxJpCrLnCc1nHnq3gOa6DZBocAIiI2TaSCA7VCJ1UJDMagCzIkXNsUYfD1daK//LTEQ8xiIbrHtcw==",
       "dev": true
     },
     "uuid": {
diff --git a/package.json b/package.json
index 00b681b..57b9a6e 100644
--- a/package.json
+++ b/package.json
@@ -38,7 +38,7 @@
     "@types/uuid": "2.0.29",
     "eip": "^1.6.4",
     "mocha": "^6.1.4",
-    "mongoose": "^4.11.1",
+    "mongoose": "^5.13.15",
     "mongoose-fixtures": "0.0.1",
     "nyc": "^14.1.1",
     "should": "11.2.0",