diff --git a/package.json b/package.json
index 7a6e809..08ffc12 100644
--- a/package.json
+++ b/package.json
@@ -38,7 +38,7 @@
     "cors": "^2.8.5",
     "debug": "4.1.1",
     "dotenv": "8.0.0",
-    "express": "4.17.1",
+    "express": "^4.17.1",
     "glob": "7.1.4",
     "js-cookie": "2.2.0",
     "jsonwebtoken": "8.5.1",
diff --git a/spec/helper.js b/spec/helper.js
index 7675262..045aa41 100644
--- a/spec/helper.js
+++ b/spec/helper.js
@@ -12,6 +12,7 @@ let ConnectServer;
 mongoose.set('useFindAndModify', false);
 mongoose.set('useCreateIndex', true);
 mongoose.set('useNewUrlParser', true);
+mongoose.set('useUnifiedTopology', true);
 
 const Parse = require('parse/node');
 Parse.serverURL = 'http://localhost:3000/parse';
diff --git a/src/db/client.js b/src/db/client.js
index 1020e21..29f84e1 100644
--- a/src/db/client.js
+++ b/src/db/client.js
@@ -4,6 +4,7 @@ const { MONGO_URI } = require('../config');
 mongoose.set('useFindAndModify', false);
 mongoose.set('useCreateIndex', true);
 mongoose.set('useNewUrlParser', true);
+mongoose.set('useUnifiedTopology', true);
 
 let parseConnect;
 let apiConnect;
diff --git a/yarn.lock b/yarn.lock
index a835442..18d5802 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1967,7 +1967,7 @@ anymatch@^3.0.3:
     normalize-path "^3.0.0"
     picomatch "^2.0.4"
 
-"apn@parse-community/node-apn#semver:^3.0.1-parse":
+"apn@github:parse-community/node-apn#semver:^3.0.1-parse":
   version "3.2.0"
   resolved "https://codeload.github.com/parse-community/node-apn/tar.gz/68de6580510bccd898891d059f8a570ad345731e"
   dependencies:
@@ -2328,9 +2328,9 @@ atob@^2.1.2:
   integrity sha512-Wm6ukoaOGJi/73p/cl2GvLjTI5JM1k/O14isD73YML8StrH/7/lRFgmg8nICZgD3bZZvjwCGxtMOD3wWNAu8cg==
 
 aws-sdk@^2.59.0:
-  version "2.824.0"
-  resolved "https://registry.yarnpkg.com/aws-sdk/-/aws-sdk-2.824.0.tgz#a67747d4d0b53d09c6c121e93f44d8f6e76fc44b"
-  integrity sha512-9KNRQBkIMPn+6DWb4gR+RzqTMNyGLEwOgXbE4dDehOIAflfLnv3IFwLnzrhxJnleB4guYrILIsBroJFBzjiekg==
+  version "2.825.0"
+  resolved "https://registry.yarnpkg.com/aws-sdk/-/aws-sdk-2.825.0.tgz#91dad854827f6f8ada5a305dd32524e2f19cc622"
+  integrity sha512-b49nvaETm7uVRLf0FJ1CMmwCRVlLaxHtptVFuxX+2L4FR9VB0sLdgsxhtL3RVFbQlgVFNRV7fJUVK27mC++H+A==
   dependencies:
     buffer "4.9.2"
     events "1.1.1"