diff --git a/src/api/common/add-file-to-drive.ts b/src/api/common/add-file-to-drive.ts
index 4102d6425..e001216ee 100644
--- a/src/api/common/add-file-to-drive.ts
+++ b/src/api/common/add-file-to-drive.ts
@@ -7,6 +7,7 @@ import DriveFile from '../models/drive-file';
 import DriveFolder from '../models/drive-folder';
 import serialize from '../serializers/drive-file';
 import event from '../event';
+import config from '../../conf';
 
 /**
  * Add file to drive
diff --git a/src/api/event.ts b/src/api/event.ts
index 584fc8e86..58b3260d5 100644
--- a/src/api/event.ts
+++ b/src/api/event.ts
@@ -1,5 +1,6 @@
 import * as mongo from 'mongodb';
 import * as redis from 'redis';
+import config from '../conf';
 
 type ID = string | mongo.ObjectID;
 
diff --git a/src/api/models/notification.ts b/src/api/models/notification.ts
index 1cb7b8083..b53db4f0b 100644
--- a/src/api/models/notification.ts
+++ b/src/api/models/notification.ts
@@ -1 +1,3 @@
-export default global.db.collection('notifications');
+import db from '../../db/mongodb';
+
+export default db.collection('notifications');
diff --git a/src/api/private/signin.ts b/src/api/private/signin.ts
index 0ff3471bb..4c592d5cf 100644
--- a/src/api/private/signin.ts
+++ b/src/api/private/signin.ts
@@ -4,6 +4,7 @@ import User from '../models/user';
 import Signin from '../models/signin';
 import serialize from '../serializers/signin';
 import event from '../event';
+import config from '../../conf';
 
 export default async (req: express.Request, res: express.Response) => {
 	res.header('Access-Control-Allow-Credentials', 'true');
diff --git a/src/api/serializers/app.ts b/src/api/serializers/app.ts
index b60bcb97e..5c41646be 100644
--- a/src/api/serializers/app.ts
+++ b/src/api/serializers/app.ts
@@ -8,6 +8,7 @@ import deepcopy = require('deepcopy');
 import App from '../models/app';
 import User from '../models/user';
 import AccessToken from '../models/access-token';
+import config from '../../conf';
 
 /**
  * Serialize an app
diff --git a/src/api/serializers/drive-file.ts b/src/api/serializers/drive-file.ts
index 76d66ce6f..a0c410e32 100644
--- a/src/api/serializers/drive-file.ts
+++ b/src/api/serializers/drive-file.ts
@@ -7,6 +7,7 @@ import * as mongo from 'mongodb';
 import DriveFile from '../models/drive-file';
 import serializeDriveTag from './drive-tag';
 import deepcopy = require('deepcopy');
+import config from '../../conf';
 
 /**
  * Serialize a drive file
diff --git a/src/api/serializers/user.ts b/src/api/serializers/user.ts
index 9eca8bbb7..cb698203b 100644
--- a/src/api/serializers/user.ts
+++ b/src/api/serializers/user.ts
@@ -8,6 +8,7 @@ import deepcopy = require('deepcopy');
 import User from '../models/user';
 import Following from '../models/following';
 import getFriends from '../common/get-friends';
+import config from '../../conf';
 
 /**
  * Serialize a user
diff --git a/src/api/streaming.ts b/src/api/streaming.ts
index 7a8d2d435..32daf872f 100644
--- a/src/api/streaming.ts
+++ b/src/api/streaming.ts
@@ -1,6 +1,7 @@
 import * as http from 'http';
 import * as websocket from 'websocket';
 import * as redis from 'redis';
+import config from '../conf';
 import User from './models/user';
 import AccessToken from './models/access-token';
 import isNativeToken from './common/is-native-token';