diff --git a/types/express-rate-limit/express-rate-limit-tests.ts b/types/express-rate-limit/express-rate-limit-tests.ts
index aa5c51a016..4b94ef6b05 100644
--- a/types/express-rate-limit/express-rate-limit-tests.ts
+++ b/types/express-rate-limit/express-rate-limit-tests.ts
@@ -3,7 +3,19 @@ import RateLimit = require("express-rate-limit");
 const apiLimiter = new RateLimit({
   windowMs: 15 * 60 * 1000, // 15 minutes
   max: 100,
-  delayMs: 0 // disabled
+  headers: false,
+  skipFailedRequests: false,
+  skipSuccessfulRequests: true,
+});
+
+const apiLimiterWithMaxFn = new RateLimit({
+    windowMs: 15 * 60 * 1000,
+    max: () => 5,
+});
+
+const apiLimiterWithMaxPromiseFn = new RateLimit({
+    windowMs: 15 * 60 * 1000,
+    max: () => Promise.resolve(5),
 });
 
 const apiLimiterWithMessageObject = new RateLimit({
@@ -17,8 +29,6 @@ const apiLimiterWithMessageObject = new RateLimit({
 
 const createAccountLimiter = new RateLimit({
   windowMs: 60 * 60 * 1000, // 1 hour window
-  delayAfter: 1, // begin slowing down responses after the first request
-  delayMs: 3 * 1000, // slow down subsequent responses by 3 seconds per request
   max: 5, // start blocking after 5 requests
   message: "Too many accounts created from this IP, please try again after an hour",
   handler: (req, _, next) => next(new Error(`TooManyRequests: ${req.ip}`))
diff --git a/types/express-rate-limit/index.d.ts b/types/express-rate-limit/index.d.ts
index b3f074f28d..9d3459e21b 100644
--- a/types/express-rate-limit/index.d.ts
+++ b/types/express-rate-limit/index.d.ts
@@ -1,6 +1,8 @@
-// Type definitions for express-rate-limit 2.9
+// Type definitions for express-rate-limit 3.3
 // Project: https://github.com/nfriedly/express-rate-limit
-// Definitions by: Cyril Schumacher <https://github.com/cyrilschumacher>, makepost <https://github.com/makepost>
+// Definitions by: Cyril Schumacher <https://github.com/cyrilschumacher>
+//                 makepost <https://github.com/makepost>
+//                 Jeremy Forsythe <https://github.com/jdforsythe>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
 // TypeScript Version: 2.2
 
@@ -21,19 +23,80 @@ declare namespace RateLimit {
         [key: string]: any;
     }
 
+    type MaxValueFn = () => number | Promise<number>;
+
     interface Options {
-        delayAfter?: number;
-        delayMs?: number;
+        /**
+         * The funciton to handle requests once `max` is exceeded. It receives the request and response objects.
+         * The "next" param is available if you need to pass to the next middleware. The `req.rateLimit` object
+         * has `limit`, `current`, and `remaining` number of requests, and if the store provides it, a `resetTime`
+         * Date object.
+         * Default: `(req, res, next) => res.status(options.statusCode).send(options.message)`
+         */
         handler?(req: express.Request, res: express.Response, next: express.NextFunction): any;
+
+        /**
+         * Enable headers for request limit (`X-RateLimit-Limit`) and current usage (`X-RateLimit-Remaining`) on all
+         * responses andtime to wait before retrying (`Retry-After`) when `max` is exceeded. Defaults to `true`.
+         */
         headers?: boolean;
+
+        /**
+         * Function used to generate keys. Defaults to using `req.ip`.
+         * Default: `(req, res) => req.ip`
+         */
         keyGenerator?(req: express.Request, res: express.Response): string;
-        max?: number;
+
+        /**
+         * Max number of connections during `windowMs` before sending a 429 response. May be a `number` or
+         * a function that returns a `number` or a `Promise<number>`. Defaults to `5`. Set to `0` to disable.
+         */
+        max?: number | MaxValueFn;
+
+        /**
+         * Error message sent to user when `max` is exceeded. May be a `string`, JSON object, or any other value
+         * that Express's `req.send()` supports. Defaults to `'Too many requests, please try again later.'`.
+         */
         message?: string | Buffer | Message;
-        skip?(req: express.Request, res: express.Response): boolean;
-        skipFailedRequests?: boolean;
-        statusCode?: number;
-        store?: Store;
+
+        /**
+         * Function that is called the first time `max` is exceeded. The `req.rateLimit` object has `limit`, `current`,
+         * and `remaining` number of requests and, if the store provides it, a `resetTime` Date object. Default is
+         * an empty function.
+         * Default: `(req, res, opts) => {}`
+         */
         onLimitReached?(req: express.Request, res: express.Response, optionsUsed: Options): void;
+
+        /**
+         * Function used to skip requests. Returning `true` from the function will skip limiting for that request. Defaults to
+         * always `false` (count all requests).
+         * Default: `(req, res) => false`
+         */
+        skip?(req: express.Request, res: express.Response): boolean;
+
+        /**
+         * When set to `true`, failed requests (status >= 400, request canceled or errored) won't be counted. Defaults to `false`.
+         */
+        skipFailedRequests?: boolean;
+
+        /**
+         * When set to `true`, successful requests (status < 400) won't be counted. Defaults to `false`.
+         */
+        skipSuccessfulRequests?: boolean;
+
+        /**
+         * HTTP status code returned when `max` is exceeded. Defaults to `429`.
+         */
+        statusCode?: number;
+
+        /**
+         * The storage to use when persisting rate limit attempts.
+         */
+        store?: Store;
+
+        /**
+         * How long in milliseconds to keep records of requests in memory. Defaults to `60000` (1 minute).
+         */
         windowMs?: number;
     }
 }
diff --git a/types/express-rate-limit/v2/express-rate-limit-tests.ts b/types/express-rate-limit/v2/express-rate-limit-tests.ts
new file mode 100644
index 0000000000..aa5c51a016
--- /dev/null
+++ b/types/express-rate-limit/v2/express-rate-limit-tests.ts
@@ -0,0 +1,39 @@
+import RateLimit = require("express-rate-limit");
+
+const apiLimiter = new RateLimit({
+  windowMs: 15 * 60 * 1000, // 15 minutes
+  max: 100,
+  delayMs: 0 // disabled
+});
+
+const apiLimiterWithMessageObject = new RateLimit({
+  windowMs: 15 * 60 * 1000, // 15 minutes
+  max: 100,
+  message: {
+     status: 429,
+     message: 'To many requests, try again later'
+  }
+});
+
+const createAccountLimiter = new RateLimit({
+  windowMs: 60 * 60 * 1000, // 1 hour window
+  delayAfter: 1, // begin slowing down responses after the first request
+  delayMs: 3 * 1000, // slow down subsequent responses by 3 seconds per request
+  max: 5, // start blocking after 5 requests
+  message: "Too many accounts created from this IP, please try again after an hour",
+  handler: (req, _, next) => next(new Error(`TooManyRequests: ${req.ip}`))
+});
+
+const callbackWithFewerParams = new RateLimit({
+  handler: (req, res) => res.status(429).json(`TooManyRequests: ${req.ip}`)
+});
+
+class SomeStore implements RateLimit.Store {
+  incr(key: string, cb: RateLimit.StoreIncrementCallback) { }
+  decrement(key: string) { }
+  resetKey(key: string) { }
+}
+
+const limiterWithStore = new RateLimit({
+  store: new SomeStore()
+});
diff --git a/types/express-rate-limit/v2/index.d.ts b/types/express-rate-limit/v2/index.d.ts
new file mode 100644
index 0000000000..b3f074f28d
--- /dev/null
+++ b/types/express-rate-limit/v2/index.d.ts
@@ -0,0 +1,42 @@
+// Type definitions for express-rate-limit 2.9
+// Project: https://github.com/nfriedly/express-rate-limit
+// Definitions by: Cyril Schumacher <https://github.com/cyrilschumacher>, makepost <https://github.com/makepost>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+// TypeScript Version: 2.2
+
+import express = require("express");
+
+declare namespace RateLimit {
+    type StoreIncrementCallback = (err?: {}, hits?: number) => void;
+
+    interface Store {
+        incr(key: string, cb: StoreIncrementCallback): void;
+        decrement(key: string): void;
+        resetKey(key: string): void;
+    }
+
+    interface Message {
+        status: number;
+        message: string;
+        [key: string]: any;
+    }
+
+    interface Options {
+        delayAfter?: number;
+        delayMs?: number;
+        handler?(req: express.Request, res: express.Response, next: express.NextFunction): any;
+        headers?: boolean;
+        keyGenerator?(req: express.Request, res: express.Response): string;
+        max?: number;
+        message?: string | Buffer | Message;
+        skip?(req: express.Request, res: express.Response): boolean;
+        skipFailedRequests?: boolean;
+        statusCode?: number;
+        store?: Store;
+        onLimitReached?(req: express.Request, res: express.Response, optionsUsed: Options): void;
+        windowMs?: number;
+    }
+}
+
+declare var RateLimit: new (options: RateLimit.Options) => express.RequestHandler;
+export = RateLimit;
diff --git a/types/express-rate-limit/v2/tsconfig.json b/types/express-rate-limit/v2/tsconfig.json
new file mode 100644
index 0000000000..0e9b4d2ad4
--- /dev/null
+++ b/types/express-rate-limit/v2/tsconfig.json
@@ -0,0 +1,26 @@
+{
+    "compilerOptions": {
+        "module": "commonjs",
+        "lib": [
+            "es6"
+        ],
+        "noImplicitAny": true,
+        "noImplicitThis": true,
+        "strictNullChecks": true,
+        "strictFunctionTypes": true,
+        "baseUrl": "../../",
+        "typeRoots": [
+            "../../"
+        ],
+        "paths": {
+            "express-rate-limit": ["express-rate-limit/v2"]
+        },
+        "types": [],
+        "noEmit": true,
+        "forceConsistentCasingInFileNames": true
+    },
+    "files": [
+        "index.d.ts",
+        "express-rate-limit-tests.ts"
+    ]
+}
diff --git a/types/express-rate-limit/v2/tslint.json b/types/express-rate-limit/v2/tslint.json
new file mode 100644
index 0000000000..3db14f85ea
--- /dev/null
+++ b/types/express-rate-limit/v2/tslint.json
@@ -0,0 +1 @@
+{ "extends": "dtslint/dt.json" }