diff --git a/package.json b/package.json
index e651f99..3963efc 100644
--- a/package.json
+++ b/package.json
@@ -16,7 +16,7 @@
     "koa-logger": "^3.1.0",
     "koa-router": "^7.3.0",
     "koa-static": "^4.0.2",
-    "mongoose": "^5.0.0-rc0",
+    "mongoose": "^5.7.5",
     "mongoose-unique-validator": "^1.0.6"
   },
   "devDependencies": {
diff --git a/yarn.lock b/yarn.lock
index d9048aa..6711d11 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -182,12 +182,6 @@ async-each@^1.0.0:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/async-each/-/async-each-1.0.1.tgz#19d386a1d9edc6e7c1c85d388aedbcc56d33602d"
 
-async@2.1.4:
-  version "2.1.4"
-  resolved "https://registry.yarnpkg.com/async/-/async-2.1.4.tgz#2d2160c7788032e4dd6cbe2502f1f9a2c8f6cde4"
-  dependencies:
-    lodash "^4.14.0"
-
 atob@^2.0.0:
   version "2.1.1"
   resolved "https://registry.yarnpkg.com/atob/-/atob-2.1.1.tgz#ae2d5a729477f289d60dd7f96a6314a22dd6c22a"
@@ -860,9 +854,9 @@ binary-extensions@^1.0.0:
   version "1.11.0"
   resolved "https://registry.yarnpkg.com/binary-extensions/-/binary-extensions-1.11.0.tgz#46aa1751fb6a2f93ee5e689bb1087d4b14c6c205"
 
-bluebird@3.5.0:
-  version "3.5.0"
-  resolved "https://registry.yarnpkg.com/bluebird/-/bluebird-3.5.0.tgz#791420d7f551eea2897453a8a77653f96606d67c"
+bluebird@3.5.1:
+  version "3.5.1"
+  resolved "https://registry.yarnpkg.com/bluebird/-/bluebird-3.5.1.tgz#d9551f9de98f1fcda1e683d17ee91a0602ee2eb9"
 
 brace-expansion@^1.1.7:
   version "1.1.11"
@@ -901,9 +895,9 @@ browserslist@^2.1.2:
     caniuse-lite "^1.0.30000792"
     electron-to-chromium "^1.3.30"
 
-bson@~1.0.4:
-  version "1.0.4"
-  resolved "https://registry.yarnpkg.com/bson/-/bson-1.0.4.tgz#93c10d39eaa5b58415cbc4052f3e53e562b0b72c"
+bson@^1.1.1, bson@~1.1.1:
+  version "1.1.6"
+  resolved "https://registry.yarnpkg.com/bson/-/bson-1.1.6.tgz#fb819be9a60cd677e0853aee4ca712a785d6618a"
 
 builtin-modules@^1.0.0:
   version "1.1.1"
@@ -1079,13 +1073,13 @@ core-util-is@~1.0.0:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/core-util-is/-/core-util-is-1.0.2.tgz#b5fd54220aa2bc5ab57aab7140c940754503c1a7"
 
-debug@*, debug@^3.1.0:
+debug@*, debug@3.1.0, debug@^3.1.0:
   version "3.1.0"
   resolved "https://registry.yarnpkg.com/debug/-/debug-3.1.0.tgz#5bb5a0672628b64149566ba16819e61518c67261"
   dependencies:
     ms "2.0.0"
 
-debug@2.6.9, debug@^2.1.2, debug@^2.2.0, debug@^2.3.3, debug@^2.6.3, debug@^2.6.8, debug@^2.6.9:
+debug@^2.1.2, debug@^2.2.0, debug@^2.3.3, debug@^2.6.3, debug@^2.6.8, debug@^2.6.9:
   version "2.6.9"
   resolved "https://registry.yarnpkg.com/debug/-/debug-2.6.9.tgz#5d128515df134ff327e90a4c93f4e077a536341f"
   dependencies:
@@ -1749,9 +1743,9 @@ json5@^0.5.0, json5@^0.5.1:
   version "0.5.1"
   resolved "https://registry.yarnpkg.com/json5/-/json5-0.5.1.tgz#1eade7acc012034ad84e2396767ead9fa5495821"
 
-kareem@2.0.0-rc5:
-  version "2.0.0-rc5"
-  resolved "https://registry.yarnpkg.com/kareem/-/kareem-2.0.0-rc5.tgz#9899c745f65f97559c26288cf269a9f30823af86"
+kareem@2.3.1:
+  version "2.3.1"
+  resolved "https://registry.yarnpkg.com/kareem/-/kareem-2.3.1.tgz#def12d9c941017fabfb00f873af95e9c99e1be87"
 
 keygrip@~1.0.2:
   version "1.0.2"
@@ -1913,14 +1907,10 @@ lodash.foreach@^4.1.0:
   version "4.5.0"
   resolved "https://registry.yarnpkg.com/lodash.foreach/-/lodash.foreach-4.5.0.tgz#1a6a35eace401280c7f06dddec35165ab27e3e53"
 
-lodash.get@4.4.2, lodash.get@^4.0.2:
+lodash.get@^4.0.2:
   version "4.4.2"
   resolved "https://registry.yarnpkg.com/lodash.get/-/lodash.get-4.4.2.tgz#2d177f652fa31e939b4438d5341499dfa3825e99"
 
-lodash@^4.14.0:
-  version "4.17.4"
-  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.4.tgz#78203a4d1c328ae1d86dca6460e369b57f4055ae"
-
 lodash@^4.17.4, lodash@^4.2.0:
   version "4.17.10"
   resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.10.tgz#1b7793cf7259ea38fb3661d4d38b3260af8ae4e7"
@@ -2051,22 +2041,17 @@ mkdirp@^0.5.0, mkdirp@^0.5.1:
   dependencies:
     minimist "0.0.8"
 
-mongodb-core@3.0.1:
-  version "3.0.1"
-  resolved "https://registry.yarnpkg.com/mongodb-core/-/mongodb-core-3.0.1.tgz#ff6dc36ee96ff596953d80a6840d6731bc92efed"
+mongodb@3.3.2:
+  version "3.3.2"
+  resolved "https://registry.yarnpkg.com/mongodb/-/mongodb-3.3.2.tgz#ff086b5f552cf07e24ce098694210f3d42d668b2"
   dependencies:
-    bson "~1.0.4"
+    bson "^1.1.1"
     require_optional "^1.0.1"
+    safe-buffer "^5.1.2"
 
-mongodb@3.0.1:
-  version "3.0.1"
-  resolved "https://registry.yarnpkg.com/mongodb/-/mongodb-3.0.1.tgz#278ee8006257ec22798594a6259546825d6de1b2"
-  dependencies:
-    mongodb-core "3.0.1"
-
-mongoose-legacy-pluralize@1.0.1:
-  version "1.0.1"
-  resolved "https://registry.yarnpkg.com/mongoose-legacy-pluralize/-/mongoose-legacy-pluralize-1.0.1.tgz#31ae25db45c30f1448c0f93f52769e903367c701"
+mongoose-legacy-pluralize@1.0.2:
+  version "1.0.2"
+  resolved "https://registry.yarnpkg.com/mongoose-legacy-pluralize/-/mongoose-legacy-pluralize-1.0.2.tgz#3ba9f91fa507b5186d399fb40854bff18fb563e4"
 
 mongoose-unique-validator@^1.0.6:
   version "1.0.6"
@@ -2075,39 +2060,44 @@ mongoose-unique-validator@^1.0.6:
     lodash.foreach "^4.1.0"
     lodash.get "^4.0.2"
 
-mongoose@^5.0.0-rc0:
-  version "5.0.0-rc0"
-  resolved "https://registry.yarnpkg.com/mongoose/-/mongoose-5.0.0-rc0.tgz#6b4d360b06db0af951da18bfd1b813a5385c25e0"
-  dependencies:
-    async "2.1.4"
-    bson "~1.0.4"
-    kareem "2.0.0-rc5"
-    lodash.get "4.4.2"
-    mongodb "3.0.1"
-    mongoose-legacy-pluralize "1.0.1"
-    mpath "0.3.0"
-    mquery "3.0.0-rc0"
-    ms "2.0.0"
-    regexp-clone "0.0.1"
+mongoose@^5.7.5:
+  version "5.7.5"
+  resolved "https://registry.yarnpkg.com/mongoose/-/mongoose-5.7.5.tgz#b787b47216edf62036aa358c3ef0f1869c46cdc2"
+  dependencies:
+    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"
 
-mpath@0.3.0:
-  version "0.3.0"
-  resolved "https://registry.yarnpkg.com/mpath/-/mpath-0.3.0.tgz#7a58f789e9b5fd3c94520634157960f26bd5ef44"
+mpath@0.6.0:
+  version "0.6.0"
+  resolved "https://registry.yarnpkg.com/mpath/-/mpath-0.6.0.tgz#aa922029fca4f0f641f360e74c5c1b6a4c47078e"
 
-mquery@3.0.0-rc0:
-  version "3.0.0-rc0"
-  resolved "https://registry.yarnpkg.com/mquery/-/mquery-3.0.0-rc0.tgz#05ec656e92f079828bedf4202e60fb8eaacb9f47"
+mquery@3.2.2:
+  version "3.2.2"
+  resolved "https://registry.yarnpkg.com/mquery/-/mquery-3.2.2.tgz#e1383a3951852ce23e37f619a9b350f1fb3664e7"
   dependencies:
-    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"
 
 ms@2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/ms/-/ms-2.0.0.tgz#5608aeadfc00be6c2901df5f9861788de0d597c8"
 
+ms@2.1.2:
+  version "2.1.2"
+  resolved "https://registry.yarnpkg.com/ms/-/ms-2.1.2.tgz#d09d1f357b443f493382a8eb3ccd183872ae6009"
+
 mz@^2.6.0:
   version "2.7.0"
   resolved "https://registry.yarnpkg.com/mz/-/mz-2.7.0.tgz#95008057a56cafadc2bc63dde7f9ff6955948e32"
@@ -2517,9 +2507,9 @@ regex-not@^1.0.0, regex-not@^1.0.2:
     extend-shallow "^3.0.2"
     safe-regex "^1.1.0"
 
-regexp-clone@0.0.1:
-  version "0.0.1"
-  resolved "https://registry.yarnpkg.com/regexp-clone/-/regexp-clone-0.0.1.tgz#a7c2e09891fdbf38fbb10d376fb73003e68ac589"
+regexp-clone@1.0.0, regexp-clone@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/regexp-clone/-/regexp-clone-1.0.0.tgz#222db967623277056260b992626354a04ce9bf63"
 
 regexpu-core@^2.0.0:
   version "2.0.0"
@@ -2593,14 +2583,10 @@ rimraf@^2.6.1:
   dependencies:
     glob "^7.0.5"
 
-safe-buffer@^5.1.1, safe-buffer@^5.1.2:
+safe-buffer@5.1.2, safe-buffer@^5.1.1, safe-buffer@^5.1.2, safe-buffer@~5.1.0, safe-buffer@~5.1.1:
   version "5.1.2"
   resolved "https://registry.yarnpkg.com/safe-buffer/-/safe-buffer-5.1.2.tgz#991ec69d296e0313747d59bdfd2b745c35f8828d"
 
-safe-buffer@~5.1.0, safe-buffer@~5.1.1:
-  version "5.1.1"
-  resolved "https://registry.yarnpkg.com/safe-buffer/-/safe-buffer-5.1.1.tgz#893312af69b2123def71f57889001671eeb2c853"
-
 safe-regex@^1.1.0:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/safe-regex/-/safe-regex-1.1.0.tgz#40a3669f3b077d1e943d44629e157dd48023bf2e"
@@ -2661,6 +2647,10 @@ setprototypeof@1.1.0:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/setprototypeof/-/setprototypeof-1.1.0.tgz#d0bd85536887b6fe7c0d818cb962d9d91c54e656"
 
+sift@7.0.1:
+  version "7.0.1"
+  resolved "https://registry.yarnpkg.com/sift/-/sift-7.0.1.tgz#47d62c50b159d316f1372f8b53f9c10cd21a4b08"
+
 signal-exit@^3.0.0:
   version "3.0.2"
   resolved "https://registry.yarnpkg.com/signal-exit/-/signal-exit-3.0.2.tgz#b5fdc08f1287ea1178628e415e25132b73646c6d"
@@ -2669,10 +2659,6 @@ slash@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/slash/-/slash-1.0.0.tgz#c41f2f6c39fc16d1cd17ad4b5d896114ae470d55"
 
-sliced@0.0.5:
-  version "0.0.5"
-  resolved "https://registry.yarnpkg.com/sliced/-/sliced-0.0.5.tgz#5edc044ca4eb6f7816d50ba2fc63e25d8fe4707f"
-
 sliced@1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/sliced/-/sliced-1.0.1.tgz#0b3a662b5d04c3177b1926bea82b03f837a2ef41"