diff --git a/types/multer/index.d.ts b/types/multer/index.d.ts
index c1cda87f6b..1199fbe181 100644
--- a/types/multer/index.d.ts
+++ b/types/multer/index.d.ts
@@ -1,9 +1,12 @@
-// Type definitions for multer
+// Type definitions for multer 1.3
 // Project: https://github.com/expressjs/multer
-// Definitions by: jt000 <https://github.com/jt000>, vilicvane <https://vilic.github.io/>, David Broder-Rodgers <https://github.com/DavidBR-SW>
+// Definitions by: jt000 <https://github.com/jt000>
+//                 vilicvane <https://vilic.github.io/>
+//                 David Broder-Rodgers <https://github.com/DavidBR-SW>
+//                 Michael Ledin <https://github.com/mxl>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
 
-import express = require('express');
+import * as express from 'express';
 
 declare namespace multer {
     interface Field {
@@ -18,7 +21,9 @@ declare namespace multer {
         dest?: string;
         /** The storage engine to use for uploaded files. */
         storage?: StorageEngine;
-        /** An object specifying the size limits of the following optional properties. This object is passed to busboy directly, and the details of properties can be found on https://github.com/mscdex/busboy#busboy-methods */
+        /** An object specifying the size limits of the following optional properties. This object is passed to busboy
+         * directly, and the details of properties can be found on https://github.com/mscdex/busboy#busboy-methods
+         */
         limits?: {
             /** Max field name size (Default: 100 bytes) */
             fieldNameSize?: number;
@@ -39,7 +44,7 @@ declare namespace multer {
         
         };
         /** A function to control which files to upload and which to skip. */
-        fileFilter?: (req: Express.Request, file: Express.Multer.File, callback: (error: Error, acceptFile: boolean) => void) => void;
+        fileFilter?(req: Express.Request, file: Express.Multer.File, callback: (error: Error, acceptFile: boolean) => void): void;
     }
 
     interface StorageEngine {
@@ -51,27 +56,23 @@ declare namespace multer {
         /** A function used to determine within which folder the uploaded files should be stored. Defaults to the system's default temporary directory. */
         destination?: string | ((req: Express.Request, file: Express.Multer.File, callback: (error: Error | null, destination: string) => void) => void);
         /** A function used to determine what the file should be named inside the folder. Defaults to a random name with no file extension. */
-        filename?: (req: Express.Request, file: Express.Multer.File, callback: (error: Error | null, filename: string) => void) => void;
+        filename?(req: Express.Request, file: Express.Multer.File, callback: (error: Error | null, filename: string) => void): void;
     }
 
     interface Instance {
         /** In case you need to handle a text-only multipart form, you can use any of the multer methods (.single(), .array(), fields()), req.body contains the text fields */
-        single(): express.RequestHandler;
-        /** Accept a single file with the name fieldname. The single file will be stored in req.file. */
-        single(fieldame: string): express.RequestHandler;
-        /** In case you need to handle a text-only multipart form, you can use any of the multer methods (.single(), .array(), fields()), req.body contains the text fields */
-        array(): express.RequestHandler;
-        /** Accept an array of files, all with the name fieldname. Optionally error out if more than maxCount files are uploaded. The array of files will be stored in req.files. */
-        array(fieldame: string, maxCount?: number): express.RequestHandler;
+        /** Accept a single file with the name fieldName. The single file will be stored in req.file. */
+        single(fieldName?: string): express.RequestHandler;
+        /** Accept an array of files, all with the name fieldName. Optionally error out if more than maxCount files are uploaded. The array of files will be stored in req.files. */
+        array(fieldName: string, maxCount?: number): express.RequestHandler;
         /** Accept a mix of files, specified by fields. An object with arrays of files will be stored in req.files. */
         fields(fields: Field[]): express.RequestHandler;
-        /** In case you need to handle a text-only multipart form, you can use any of the multer methods (.single(), .array(), fields()), req.body contains the text fields */
+        /** Accepts all files that comes over the wire. An array of files will be stored in req.files. */
         any(): express.RequestHandler;
     }
 }
 
 interface Multer {
-
     (options?: multer.Options): multer.Instance;
 
     /* The disk storage engine gives you full control on storing files to disk. */
@@ -80,21 +81,21 @@ interface Multer {
     memoryStorage(): multer.StorageEngine;
 }
 
-declare var multer: Multer;
+declare const multer: Multer;
 
 export = multer;
 
 declare global {
     namespace Express {
-        export interface Request {
+        interface Request {
             file: Multer.File;
             files: {
                 [fieldname: string]: Multer.File[];
-            };
+            } | Multer.File[];
         }
 
         namespace Multer {
-            export interface File {
+            interface File {
                 /** Field name specified in the form */
                 fieldname: string;
                 /** Name of the file on the user's computer */
diff --git a/types/multer/multer-tests.ts b/types/multer/multer-tests.ts
index 00cbc52b98..e5af7862d5 100644
--- a/types/multer/multer-tests.ts
+++ b/types/multer/multer-tests.ts
@@ -1,33 +1,30 @@
+import * as express from 'express';
+import * as multer from 'multer';
 
+const upload = multer({ dest: 'uploads/' });
 
+const app = express();
 
-import express = require('express');
-import multer = require('multer');
-
-var upload = multer({ dest: 'uploads/' });
-
-var app = express();
-
-app.post('/profile', upload.single('avatar'), (req, res, next) => {
+app.post('/profile', upload.single('avatar'), (req: express.Request, res: express.Response, next: express.NextFunction) => {
 });
 
-app.post('/photos/upload', upload.array('photos', 12), (req, res, next) => {
+app.post('/photos/upload', upload.array('photos', 12), (req: express.Request, res: express.Response, next: express.NextFunction) => {
 });
 
-var cpUpload = upload.fields([{ name: 'avatar', maxCount: 1 }, { name: 'gallery', maxCount: 8 }])
-app.post('/cool-profile', cpUpload, (req, res, next) => {
+const cpUpload = upload.fields([{ name: 'avatar', maxCount: 1 }, { name: 'gallery', maxCount: 8 }]);
+app.post('/cool-profile', cpUpload, (req: express.Request, res: express.Response, next: express.NextFunction) => {
 });
 
-var diskStorage = multer.diskStorage({
+const diskStorage = multer.diskStorage({
     destination(req, file, cb) {
         cb(null, '/tmp/my-uploads');
     },
     filename(req, file, cb) {
         cb(null, file.fieldname + '-' + Date.now());
     }
-})
+});
 
-var diskUpload = multer({ storage: diskStorage });
+const diskUpload = multer({ storage: diskStorage });
 
-var memoryStorage = multer.memoryStorage();
-var memoryUpload = multer({ storage: memoryStorage });
+const memoryStorage = multer.memoryStorage();
+const memoryUpload = multer({ storage: memoryStorage });
diff --git a/types/multer/tsconfig.json b/types/multer/tsconfig.json
index 4a6fa797a4..500a8758a9 100644
--- a/types/multer/tsconfig.json
+++ b/types/multer/tsconfig.json
@@ -6,7 +6,7 @@
         ],
         "noImplicitAny": true,
         "noImplicitThis": true,
-        "strictNullChecks": false,
+        "strictNullChecks": true,
         "baseUrl": "../",
         "typeRoots": [
             "../"
@@ -19,4 +19,4 @@
         "index.d.ts",
         "multer-tests.ts"
     ]
-}
\ No newline at end of file
+}
diff --git a/types/multer/tslint.json b/types/multer/tslint.json
new file mode 100644
index 0000000000..3db14f85ea
--- /dev/null
+++ b/types/multer/tslint.json
@@ -0,0 +1 @@
+{ "extends": "dtslint/dt.json" }