diff --git a/gulpfile.ts b/gulpfile.ts
index 9afbd5796..1c5516801 100644
--- a/gulpfile.ts
+++ b/gulpfile.ts
@@ -14,15 +14,15 @@ import * as browserify from 'browserify';
 import * as source from 'vinyl-source-stream';
 import * as buffer from 'vinyl-buffer';
 import * as es from 'event-stream';
-const stylus = require('gulp-stylus');
-const cssnano = require('gulp-cssnano');
+import stylus = require('gulp-stylus');
+import cssnano = require('gulp-cssnano');
 import * as uglify from 'gulp-uglify';
-const ls = require('browserify-livescript');
-const aliasify = require('aliasify');
-const riotify = require('riotify');
-const transformify = require('syuilo-transformify');
-const pug = require('gulp-pug');
-const git = require('git-last-commit');
+import ls = require('browserify-livescript');
+import aliasify = require('aliasify');
+import riotify = require('riotify');
+import transformify = require('syuilo-transformify');
+import pug = require('gulp-pug');
+import git = require('git-last-commit');
 import * as rimraf from 'rimraf';
 import * as escapeHtml from 'escape-html';
 
diff --git a/src/api/common/add-file-to-drive.ts b/src/api/common/add-file-to-drive.ts
index 0bd9f3482..4102d6425 100644
--- a/src/api/common/add-file-to-drive.ts
+++ b/src/api/common/add-file-to-drive.ts
@@ -1,8 +1,8 @@
 import * as mongodb from 'mongodb';
 import * as crypto from 'crypto';
 import * as gm from 'gm';
-const fileType = require('file-type');
-const prominence = require('prominence');
+import fileType = require('file-type');
+import prominence = require('prominence');
 import DriveFile from '../models/drive-file';
 import DriveFolder from '../models/drive-folder';
 import serialize from '../serializers/drive-file';
diff --git a/src/api/private/signup.ts b/src/api/private/signup.ts
index d00855414..c50b07005 100644
--- a/src/api/private/signup.ts
+++ b/src/api/private/signup.ts
@@ -1,7 +1,7 @@
 import * as express from 'express';
 import * as bcrypt from 'bcrypt';
 import rndstr from 'rndstr';
-const recaptcha = require('recaptcha-promise');
+import recaptcha = require('recaptcha-promise');
 import User from '../models/user';
 import { validateUsername } from '../models/user';
 import serialize from '../serializers/user';
diff --git a/src/api/serializers/app.ts b/src/api/serializers/app.ts
index 23a12c977..1c4b244a3 100644
--- a/src/api/serializers/app.ts
+++ b/src/api/serializers/app.ts
@@ -4,7 +4,7 @@
  * Module dependencies
  */
 import * as mongo from 'mongodb';
-const deepcopy = require('deepcopy');
+import deepcopy = require('deepcopy');
 import App from '../models/app';
 import User from '../models/user';
 import Userkey from '../models/userkey';
diff --git a/src/api/serializers/auth-session.ts b/src/api/serializers/auth-session.ts
index 786684b4e..b2dc93d3f 100644
--- a/src/api/serializers/auth-session.ts
+++ b/src/api/serializers/auth-session.ts
@@ -4,7 +4,7 @@
  * Module dependencies
  */
 import * as mongo from 'mongodb';
-const deepcopy = require('deepcopy');
+import deepcopy = require('deepcopy');
 import serializeApp from './app';
 
 /**
diff --git a/src/api/serializers/drive-file.ts b/src/api/serializers/drive-file.ts
index 635cf1386..76d66ce6f 100644
--- a/src/api/serializers/drive-file.ts
+++ b/src/api/serializers/drive-file.ts
@@ -6,7 +6,7 @@
 import * as mongo from 'mongodb';
 import DriveFile from '../models/drive-file';
 import serializeDriveTag from './drive-tag';
-const deepcopy = require('deepcopy');
+import deepcopy = require('deepcopy');
 
 /**
  * Serialize a drive file
diff --git a/src/api/serializers/drive-folder.ts b/src/api/serializers/drive-folder.ts
index ee5a973e1..102c8aeff 100644
--- a/src/api/serializers/drive-folder.ts
+++ b/src/api/serializers/drive-folder.ts
@@ -5,7 +5,7 @@
  */
 import * as mongo from 'mongodb';
 import DriveFolder from '../models/drive-folder';
-const deepcopy = require('deepcopy');
+import deepcopy = require('deepcopy');
 
 /**
  * Serialize a drive folder
diff --git a/src/api/serializers/drive-tag.ts b/src/api/serializers/drive-tag.ts
index 182e9a66d..603b1d7d3 100644
--- a/src/api/serializers/drive-tag.ts
+++ b/src/api/serializers/drive-tag.ts
@@ -5,7 +5,7 @@
  */
 import * as mongo from 'mongodb';
 import DriveTag from '../models/drive-tag';
-const deepcopy = require('deepcopy');
+import deepcopy = require('deepcopy');
 
 /**
  * Serialize a drive tag
diff --git a/src/api/serializers/messaging-message.ts b/src/api/serializers/messaging-message.ts
index 0855b25d1..c25b9968a 100644
--- a/src/api/serializers/messaging-message.ts
+++ b/src/api/serializers/messaging-message.ts
@@ -7,7 +7,7 @@ import * as mongo from 'mongodb';
 import Message from '../models/messaging-message';
 import serializeUser from './user';
 import serializeDriveFile from './drive-file';
-const deepcopy = require('deepcopy');
+import deepcopy = require('deepcopy');
 
 /**
  * Serialize a message
diff --git a/src/api/serializers/notification.ts b/src/api/serializers/notification.ts
index 56769f50d..076fef5fe 100644
--- a/src/api/serializers/notification.ts
+++ b/src/api/serializers/notification.ts
@@ -7,7 +7,7 @@ import * as mongo from 'mongodb';
 import Notification from '../models/notification';
 import serializeUser from './user';
 import serializePost from './post';
-const deepcopy = require('deepcopy');
+import deepcopy = require('deepcopy');
 
 /**
  * Serialize a notification
diff --git a/src/api/serializers/post.ts b/src/api/serializers/post.ts
index a17aa9035..302383789 100644
--- a/src/api/serializers/post.ts
+++ b/src/api/serializers/post.ts
@@ -8,7 +8,7 @@ import Post from '../models/post';
 import Like from '../models/like';
 import serializeUser from './user';
 import serializeDriveFile from './drive-file';
-const deepcopy = require('deepcopy');
+import deepcopy = require('deepcopy');
 
 /**
  * Serialize a post
diff --git a/src/api/serializers/signin.ts b/src/api/serializers/signin.ts
index d6d7a3947..828a16538 100644
--- a/src/api/serializers/signin.ts
+++ b/src/api/serializers/signin.ts
@@ -3,7 +3,7 @@
 /**
  * Module dependencies
  */
-const deepcopy = require('deepcopy');
+import deepcopy = require('deepcopy');
 
 /**
  * Serialize a signin record
diff --git a/src/api/serializers/user.ts b/src/api/serializers/user.ts
index 058586395..9eca8bbb7 100644
--- a/src/api/serializers/user.ts
+++ b/src/api/serializers/user.ts
@@ -4,7 +4,7 @@
  * Module dependencies
  */
 import * as mongo from 'mongodb';
-const deepcopy = require('deepcopy');
+import deepcopy = require('deepcopy');
 import User from '../models/user';
 import Following from '../models/following';
 import getFriends from '../common/get-friends';
diff --git a/src/index.ts b/src/index.ts
index df96e6b63..84be38b01 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -12,7 +12,7 @@ import * as os from 'os';
 import * as cluster from 'cluster';
 import Logger from './utils/logger';
 import * as chalk from 'chalk';
-const portUsed = require('tcp-port-used');
+import portUsed = require('tcp-port-used');
 import isRoot = require('is-root');
 import ProgressBar from './utils/cli/progressbar';
 import initdb from './db/mongodb';
diff --git a/src/server.ts b/src/server.ts
index a327504b2..e9bc07a7f 100644
--- a/src/server.ts
+++ b/src/server.ts
@@ -5,9 +5,8 @@
 import * as fs from 'fs';
 import * as http from 'http';
 import * as https from 'https';
-
 import * as express from 'express';
-const vhost = require('vhost');
+import vhost = require('vhost');
 
 /**
  * Init app
diff --git a/src/utils/lastCommitInfo.ts b/src/utils/lastCommitInfo.ts
index ac62f22be..9682365da 100644
--- a/src/utils/lastCommitInfo.ts
+++ b/src/utils/lastCommitInfo.ts
@@ -1,7 +1,7 @@
 import Logger from './logger';
 import * as chalk from 'chalk';
-const prominence = require('prominence');
-const git = require('git-last-commit');
+import prominence = require('prominence');
+import git = require('git-last-commit');
 
 export default class {
 	static async show(): Promise<void> {
diff --git a/src/web/meta.ts b/src/web/meta.ts
index 8f04f6592..41bba8c0b 100644
--- a/src/web/meta.ts
+++ b/src/web/meta.ts
@@ -1,5 +1,5 @@
 import * as express from 'express';
-const git = require('git-last-commit');
+import git = require('git-last-commit');
 
 module.exports = async (req: express.Request, res: express.Response) => {
 	// Get commit info
diff --git a/src/web/serve-app.ts b/src/web/serve-app.ts
index 3292cfde3..a298d593a 100644
--- a/src/web/serve-app.ts
+++ b/src/web/serve-app.ts
@@ -1,6 +1,6 @@
 import * as path from 'path';
 import * as express from 'express';
-import * as ms from 'ms';
+import ms = require('ms');
 
 export default (name: string) => (req: express.Request, res: express.Response) => {
 	res.sendFile(path.resolve(`${__dirname}/app/${name}/view.html`), {
diff --git a/src/web/server.ts b/src/web/server.ts
index 31c00bc4a..29041e12f 100644
--- a/src/web/server.ts
+++ b/src/web/server.ts
@@ -2,7 +2,7 @@
  * Web Server
  */
 
-import * as ms from 'ms';
+import ms = require('ms');
 
 // express modules
 import * as express from 'express';
diff --git a/src/web/service/rss-proxy.ts b/src/web/service/rss-proxy.ts
index 8cc3711e7..b2862bdd5 100644
--- a/src/web/service/rss-proxy.ts
+++ b/src/web/service/rss-proxy.ts
@@ -1,6 +1,6 @@
 import * as express from 'express';
 import * as request from 'request';
-const xml2json = require('xml2json');
+import xml2json = require('xml2json');
 
 module.exports = (req: express.Request, res: express.Response) => {
 	const url: string = req.body.url;