diff --git a/package-lock.json b/package-lock.json
index f8576db..50898cc 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1653,7 +1653,8 @@
       "dev": true
     },
     "bignumber.js": {
-      "version": "git+https://github.com/frozeman/bignumber.js-nolookahead.git#57692b3ecfc98bbdd6b3a516cb2353652ea49934"
+      "version": "git+https://github.com/frozeman/bignumber.js-nolookahead.git#57692b3ecfc98bbdd6b3a516cb2353652ea49934",
+      "from": "git+https://github.com/frozeman/bignumber.js-nolookahead.git#57692b3ecfc98bbdd6b3a516cb2353652ea49934"
     },
     "binary-extensions": {
       "version": "1.11.0",
@@ -1791,6 +1792,7 @@
       "resolved": "https://registry.npmjs.org/boom/-/boom-2.10.1.tgz",
       "integrity": "sha1-OciRjO/1eZ+D+UkqhI9iWt0Mdm8=",
       "dev": true,
+      "optional": true,
       "requires": {
         "hoek": "2.16.3"
       }
@@ -2171,9 +2173,9 @@
       }
     },
     "bson": {
-      "version": "1.0.9",
-      "resolved": "https://registry.npmjs.org/bson/-/bson-1.0.9.tgz",
-      "integrity": "sha512-IQX9/h7WdMBIW/q/++tGd+emQr0XMdeZ6icnT/74Xk9fnabWn+gZgpE+9V+gujL3hhJOoNrnDVY7tWdzc7NUTg=="
+      "version": "1.1.4",
+      "resolved": "https://registry.npmjs.org/bson/-/bson-1.1.4.tgz",
+      "integrity": "sha512-S/yKGU1syOMzO86+dGpg2qGoDL0zvzcb262G+gqEy6TgP6rt6z6qxSFX/8X6vLC91P7G7C3nLs0+bvDzmvBA3Q=="
     },
     "buffer": {
       "version": "4.9.1",
@@ -3186,7 +3188,7 @@
     },
     "elliptic": {
       "version": "3.1.0",
-      "resolved": "http://registry.npmjs.org/elliptic/-/elliptic-3.1.0.tgz",
+      "resolved": "https://registry.npmjs.org/elliptic/-/elliptic-3.1.0.tgz",
       "integrity": "sha1-whaC73YnabVqdCAWCRBdoR1fYMw=",
       "requires": {
         "bn.js": "2.2.0",
@@ -3261,11 +3263,6 @@
         "is-symbol": "1.0.1"
       }
     },
-    "es6-promise": {
-      "version": "3.2.1",
-      "resolved": "https://registry.npmjs.org/es6-promise/-/es6-promise-3.2.1.tgz",
-      "integrity": "sha1-7FYjOGgDKQkgcXDDlEjiREndH8Q="
-    },
     "escape-html": {
       "version": "1.0.3",
       "resolved": "https://registry.npmjs.org/escape-html/-/escape-html-1.0.3.tgz",
@@ -3367,6 +3364,7 @@
     },
     "ethereumjs-abi": {
       "version": "git+https://github.com/ethereumjs/ethereumjs-abi.git#4ea2fdfed09e8f99117d9362d17c6b01b64a2bcf",
+      "from": "git+https://github.com/ethereumjs/ethereumjs-abi.git#4ea2fdfed09e8f99117d9362d17c6b01b64a2bcf",
       "requires": {
         "bn.js": "4.11.8",
         "ethereumjs-util": "5.2.0"
@@ -4033,7 +4031,8 @@
         },
         "ansi-regex": {
           "version": "2.1.1",
-          "bundled": true
+          "bundled": true,
+          "optional": true
         },
         "aproba": {
           "version": "1.2.0",
@@ -4051,11 +4050,13 @@
         },
         "balanced-match": {
           "version": "1.0.0",
-          "bundled": true
+          "bundled": true,
+          "optional": true
         },
         "brace-expansion": {
           "version": "1.1.11",
           "bundled": true,
+          "optional": true,
           "requires": {
             "balanced-match": "1.0.0",
             "concat-map": "0.0.1"
@@ -4068,15 +4069,18 @@
         },
         "code-point-at": {
           "version": "1.1.0",
-          "bundled": true
+          "bundled": true,
+          "optional": true
         },
         "concat-map": {
           "version": "0.0.1",
-          "bundled": true
+          "bundled": true,
+          "optional": true
         },
         "console-control-strings": {
           "version": "1.1.0",
-          "bundled": true
+          "bundled": true,
+          "optional": true
         },
         "core-util-is": {
           "version": "1.0.2",
@@ -4179,7 +4183,8 @@
         },
         "inherits": {
           "version": "2.0.3",
-          "bundled": true
+          "bundled": true,
+          "optional": true
         },
         "ini": {
           "version": "1.3.5",
@@ -4189,6 +4194,7 @@
         "is-fullwidth-code-point": {
           "version": "1.0.0",
           "bundled": true,
+          "optional": true,
           "requires": {
             "number-is-nan": "1.0.1"
           }
@@ -4201,17 +4207,20 @@
         "minimatch": {
           "version": "3.0.4",
           "bundled": true,
+          "optional": true,
           "requires": {
             "brace-expansion": "1.1.11"
           }
         },
         "minimist": {
           "version": "0.0.8",
-          "bundled": true
+          "bundled": true,
+          "optional": true
         },
         "minipass": {
           "version": "2.2.4",
           "bundled": true,
+          "optional": true,
           "requires": {
             "safe-buffer": "5.1.1",
             "yallist": "3.0.2"
@@ -4228,6 +4237,7 @@
         "mkdirp": {
           "version": "0.5.1",
           "bundled": true,
+          "optional": true,
           "requires": {
             "minimist": "0.0.8"
           }
@@ -4300,7 +4310,8 @@
         },
         "number-is-nan": {
           "version": "1.0.1",
-          "bundled": true
+          "bundled": true,
+          "optional": true
         },
         "object-assign": {
           "version": "4.1.1",
@@ -4310,6 +4321,7 @@
         "once": {
           "version": "1.4.0",
           "bundled": true,
+          "optional": true,
           "requires": {
             "wrappy": "1.0.2"
           }
@@ -4385,7 +4397,8 @@
         },
         "safe-buffer": {
           "version": "5.1.1",
-          "bundled": true
+          "bundled": true,
+          "optional": true
         },
         "safer-buffer": {
           "version": "2.1.2",
@@ -4415,6 +4428,7 @@
         "string-width": {
           "version": "1.0.2",
           "bundled": true,
+          "optional": true,
           "requires": {
             "code-point-at": "1.1.0",
             "is-fullwidth-code-point": "1.0.0",
@@ -4432,6 +4446,7 @@
         "strip-ansi": {
           "version": "3.0.1",
           "bundled": true,
+          "optional": true,
           "requires": {
             "ansi-regex": "2.1.1"
           }
@@ -4470,11 +4485,13 @@
         },
         "wrappy": {
           "version": "1.0.2",
-          "bundled": true
+          "bundled": true,
+          "optional": true
         },
         "yallist": {
           "version": "3.0.2",
-          "bundled": true
+          "bundled": true,
+          "optional": true
         }
       }
     },
@@ -5137,7 +5154,8 @@
       "version": "2.16.3",
       "resolved": "https://registry.npmjs.org/hoek/-/hoek-2.16.3.tgz",
       "integrity": "sha1-ILt0A9POo5jpHcRxCo/xuCdKJe0=",
-      "dev": true
+      "dev": true,
+      "optional": true
     },
     "home-or-tmp": {
       "version": "2.0.0",
@@ -5157,11 +5175,6 @@
         "parse-passwd": "1.0.0"
       }
     },
-    "hooks-fixed": {
-      "version": "2.0.2",
-      "resolved": "https://registry.npmjs.org/hooks-fixed/-/hooks-fixed-2.0.2.tgz",
-      "integrity": "sha512-YurCM4gQSetcrhwEtpQHhQ4M7Zo7poNGqY4kQGeBS6eZtOcT3tnNs01ThFa0jYBByAiYt1MjMjP/YApG0EnAvQ=="
-    },
     "hosted-git-info": {
       "version": "2.6.0",
       "resolved": "https://registry.npmjs.org/hosted-git-info/-/hosted-git-info-2.6.0.tgz",
@@ -5806,9 +5819,9 @@
       }
     },
     "kareem": {
-      "version": "1.5.0",
-      "resolved": "https://registry.npmjs.org/kareem/-/kareem-1.5.0.tgz",
-      "integrity": "sha1-4+QQHZ3P3imXadr0tNtk2JXRdEg="
+      "version": "2.3.1",
+      "resolved": "https://registry.npmjs.org/kareem/-/kareem-2.3.1.tgz",
+      "integrity": "sha512-l3hLhffs9zqoDe8zjmb/mAN4B8VT3L56EUvKNqLFVs9YlFA+zx7ke1DO8STAdDyYNkeSo1nKmjuvQeI12So8Xw=="
     },
     "keccak": {
       "version": "1.4.0",
@@ -6252,11 +6265,6 @@
       "integrity": "sha1-8xwiIlqWMtK7+OSt2+8kCqdlph8=",
       "dev": true
     },
-    "lodash.get": {
-      "version": "4.4.2",
-      "resolved": "https://registry.npmjs.org/lodash.get/-/lodash.get-4.4.2.tgz",
-      "integrity": "sha1-LRd/ZS+jHpObRDjVNBSZ36OCXpk="
-    },
     "lodash.isarguments": {
       "version": "3.1.0",
       "resolved": "https://registry.npmjs.org/lodash.isarguments/-/lodash.isarguments-3.1.0.tgz",
@@ -6641,84 +6649,69 @@
       }
     },
     "mongodb": {
-      "version": "2.2.34",
-      "resolved": "https://registry.npmjs.org/mongodb/-/mongodb-2.2.34.tgz",
-      "integrity": "sha1-o09Zu+thdUrsQy3nLD/iFSakTBo=",
-      "requires": {
-        "es6-promise": "3.2.1",
-        "mongodb-core": "2.1.18",
-        "readable-stream": "2.2.7"
-      }
-    },
-    "mongodb-core": {
-      "version": "2.1.18",
-      "resolved": "https://registry.npmjs.org/mongodb-core/-/mongodb-core-2.1.18.tgz",
-      "integrity": "sha1-TEYTm986HwMt7ZHbSfOO7AFlkFA=",
+      "version": "3.3.2",
+      "resolved": "https://registry.npmjs.org/mongodb/-/mongodb-3.3.2.tgz",
+      "integrity": "sha512-fqJt3iywelk4yKu/lfwQg163Bjpo5zDKhXiohycvon4iQHbrfflSAz9AIlRE6496Pm/dQKQK5bMigdVo2s6gBg==",
       "requires": {
-        "bson": "1.0.9",
-        "require_optional": "1.0.1"
+        "bson": "^1.1.1",
+        "require_optional": "^1.0.1",
+        "safe-buffer": "^5.1.2"
       }
     },
     "mongoose": {
-      "version": "4.13.14",
-      "resolved": "https://registry.npmjs.org/mongoose/-/mongoose-4.13.14.tgz",
-      "integrity": "sha512-20zynb1fvCO37AP+0iTPGDbt4dJJkzM9fNK5BwKf5n+gFU5YYdXpnhxs9Kf8C+Fe0xY8vpUKV8wA7VGWcmDaFw==",
-      "requires": {
-        "async": "2.6.0",
-        "bson": "1.0.9",
-        "hooks-fixed": "2.0.2",
-        "kareem": "1.5.0",
-        "lodash.get": "4.4.2",
-        "mongodb": "2.2.34",
-        "mpath": "0.3.0",
-        "mpromise": "0.5.5",
-        "mquery": "2.3.3",
-        "ms": "2.0.0",
-        "muri": "1.3.0",
-        "regexp-clone": "0.0.1",
+      "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": "0.6.0",
+        "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": {
-        "async": {
-          "version": "2.6.0",
-          "resolved": "https://registry.npmjs.org/async/-/async-2.6.0.tgz",
-          "integrity": "sha512-xAfGg1/NTLBBKlHFmnd7PlmUW9KhVQIUuSrYem9xzFUZy13ScvtyGGejaae9iAVRiRq9+Cx7DPFaAAhCpyxyPw==",
-          "requires": {
-            "lodash": "4.17.10"
-          }
+        "ms": {
+          "version": "2.1.2",
+          "resolved": "https://registry.npmjs.org/ms/-/ms-2.1.2.tgz",
+          "integrity": "sha512-sGkPx+VjMtmA6MX27oA4FBFELFCZZ4S4XqeGOXCv68tT+jb3vk/RyaKWP0PTKyWtmLSM0b+adUTEvbs1PEaH2w=="
         }
       }
     },
-    "mpath": {
-      "version": "0.3.0",
-      "resolved": "https://registry.npmjs.org/mpath/-/mpath-0.3.0.tgz",
-      "integrity": "sha1-elj3iem1/TyUUgY0FXlg8mvV70Q="
+    "mongoose-legacy-pluralize": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/mongoose-legacy-pluralize/-/mongoose-legacy-pluralize-1.0.2.tgz",
+      "integrity": "sha512-Yo/7qQU4/EyIS8YDFSeenIvXxZN+ld7YdV9LqFVQJzTLye8unujAWPZ4NWKfFA+RNjh+wvTWKY9Z3E5XM6ZZiQ=="
     },
-    "mpromise": {
-      "version": "0.5.5",
-      "resolved": "https://registry.npmjs.org/mpromise/-/mpromise-0.5.5.tgz",
-      "integrity": "sha1-9bJCWddjrMIlewoMjG2Gb9UXMuY="
+    "mpath": {
+      "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": "2.3.3",
-      "resolved": "https://registry.npmjs.org/mquery/-/mquery-2.3.3.tgz",
-      "integrity": "sha512-NC8L14kn+qxJbbJ1gbcEMDxF0sC3sv+1cbRReXXwVvowcwY1y9KoVZFq0ebwARibsadu8lx8nWGvm3V0Pf0ZWQ==",
+      "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="
-        },
-        "sliced": {
-          "version": "0.0.5",
-          "resolved": "https://registry.npmjs.org/sliced/-/sliced-0.0.5.tgz",
-          "integrity": "sha1-XtwETKTrb3gW1Qui/GPiXY/kcH8="
+        "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"
+          }
         }
       }
     },
@@ -6780,11 +6773,6 @@
         }
       }
     },
-    "muri": {
-      "version": "1.3.0",
-      "resolved": "https://registry.npmjs.org/muri/-/muri-1.3.0.tgz",
-      "integrity": "sha512-FiaFwKl864onHFFUV/a2szAl7X0fxVlSKNdhTf+BM8i8goEgYut8u5P9MqQqIYwvaMxjzVESsoEm/2kfkFH1rg=="
-    },
     "nan": {
       "version": "2.10.0",
       "resolved": "https://registry.npmjs.org/nan/-/nan-2.10.0.tgz",
@@ -8005,9 +7993,9 @@
       }
     },
     "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=="
     },
     "regexpu-core": {
       "version": "2.0.0",
@@ -8157,8 +8145,8 @@
       "resolved": "https://registry.npmjs.org/require_optional/-/require_optional-1.0.1.tgz",
       "integrity": "sha512-qhM/y57enGWHAe3v/NcwML6a3/vfESLe/sGM2dII+gEO0BpKRUkWZow/tyloNqJyN6kXSl3RyyM8Ll5D/sJP8g==",
       "requires": {
-        "resolve-from": "2.0.0",
-        "semver": "5.5.0"
+        "resolve-from": "^2.0.0",
+        "semver": "^5.1.0"
       }
     },
     "resolve": {
@@ -8492,6 +8480,11 @@
         "jsonify": "0.0.0"
       }
     },
+    "sift": {
+      "version": "7.0.1",
+      "resolved": "https://registry.npmjs.org/sift/-/sift-7.0.1.tgz",
+      "integrity": "sha512-oqD7PMJ+uO6jV9EQCl0LrRw1OwsiPsiFQR5AR30heR+4Dl7jBBbDLnNvWiak20tzZlSE1H7RB30SX/1j/YYT7g=="
+    },
     "sigmund": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/sigmund/-/sigmund-1.0.1.tgz",
diff --git a/package.json b/package.json
index 6ce0d8b..69aa363 100644
--- a/package.json
+++ b/package.json
@@ -21,7 +21,7 @@
     "ethereumjs-wallet": "^0.6.0",
     "express": "^4.15.2",
     "jquery": "^3.2.1",
-    "mongoose": "^4.9.7",
+    "mongoose": "^5.7.5",
     "multihashes": "^0.4.5",
     "node-telegram-bot-api": "^0.27.0",
     "nunjucks": "^3.0.0",