diff --git a/integration/websockets/e2e/error-gateway.spec.ts b/integration/websockets/e2e/error-gateway.spec.ts
index 57b73be0d..95a7d4d28 100644
--- a/integration/websockets/e2e/error-gateway.spec.ts
+++ b/integration/websockets/e2e/error-gateway.spec.ts
@@ -1,7 +1,7 @@
 import { INestApplication } from '@nestjs/common';
 import { Test } from '@nestjs/testing';
 import { expect } from 'chai';
-import * as io from 'socket.io-client';
+import { io } from 'socket.io-client';
 import { ErrorGateway } from '../src/error.gateway';
 
 describe('ErrorGateway', () => {
@@ -16,7 +16,7 @@ describe('ErrorGateway', () => {
   });
 
   it(`should handle error`, async () => {
-    const ws = io.connect('http://localhost:8080');
+    const ws = io('http://localhost:8080');
     ws.emit('push', {
       test: 'test',
     });
diff --git a/integration/websockets/e2e/gateway-ack.spec.ts b/integration/websockets/e2e/gateway-ack.spec.ts
index e01383493..034a7ae29 100644
--- a/integration/websockets/e2e/gateway-ack.spec.ts
+++ b/integration/websockets/e2e/gateway-ack.spec.ts
@@ -1,14 +1,14 @@
 import { INestApplication } from '@nestjs/common';
 import { Test } from '@nestjs/testing';
 import { expect } from 'chai';
-import * as io from 'socket.io-client';
+import { io } from 'socket.io-client';
 import { AckGateway } from '../src/ack.gateway';
 
 async function createNestApp(...gateways): Promise<INestApplication> {
   const testingModule = await Test.createTestingModule({
     providers: gateways,
   }).compile();
-  const app = await testingModule.createNestApplication();
+  const app = testingModule.createNestApplication();
   return app;
 }
 
@@ -19,7 +19,7 @@ describe('WebSocketGateway (ack)', () => {
     app = await createNestApp(AckGateway);
     await app.listen(3000);
 
-    ws = io.connect('http://localhost:8080');
+    ws = io('http://localhost:8080');
     await new Promise<void>(resolve =>
       ws.emit('push', { test: 'test' }, data => {
         expect(data).to.be.eql('pong');
@@ -32,7 +32,7 @@ describe('WebSocketGateway (ack)', () => {
     app = await createNestApp(AckGateway);
     await app.listen(3000);
 
-    ws = io.connect('http://localhost:8080');
+    ws = io('http://localhost:8080');
     await new Promise<void>(resolve =>
       ws.emit('push', data => {
         expect(data).to.be.eql('pong');
diff --git a/integration/websockets/e2e/gateway.spec.ts b/integration/websockets/e2e/gateway.spec.ts
index c1b004828..cde31c4b2 100644
--- a/integration/websockets/e2e/gateway.spec.ts
+++ b/integration/websockets/e2e/gateway.spec.ts
@@ -1,7 +1,7 @@
 import { INestApplication } from '@nestjs/common';
 import { Test } from '@nestjs/testing';
 import { expect } from 'chai';
-import * as io from 'socket.io-client';
+import { io } from 'socket.io-client';
 import { ApplicationGateway } from '../src/app.gateway';
 import { NamespaceGateway } from '../src/namespace.gateway';
 import { ServerGateway } from '../src/server.gateway';
@@ -10,7 +10,7 @@ async function createNestApp(...gateways): Promise<INestApplication> {
   const testingModule = await Test.createTestingModule({
     providers: gateways,
   }).compile();
-  const app = await testingModule.createNestApplication();
+  const app = testingModule.createNestApplication();
   return app;
 }
 
@@ -21,7 +21,7 @@ describe('WebSocketGateway', () => {
     app = await createNestApp(ApplicationGateway);
     await app.listen(3000);
 
-    ws = io.connect('http://localhost:8080');
+    ws = io('http://localhost:8080');
     ws.emit('push', {
       test: 'test',
     });
@@ -37,7 +37,7 @@ describe('WebSocketGateway', () => {
     app = await createNestApp(ServerGateway);
     await app.listen(3000);
 
-    ws = io.connect('http://localhost:3000');
+    ws = io('http://localhost:3000');
     ws.emit('push', {
       test: 'test',
     });
@@ -53,8 +53,8 @@ describe('WebSocketGateway', () => {
     app = await createNestApp(ApplicationGateway, NamespaceGateway);
     await app.listen(3000);
 
-    ws = io.connect('http://localhost:8080');
-    io.connect('http://localhost:8080/test').emit('push', {});
+    ws = io('http://localhost:8080');
+    io('http://localhost:8080/test').emit('push', {});
     ws.emit('push', {
       test: 'test',
     });
diff --git a/packages/core/helpers/router-method-factory.ts b/packages/core/helpers/router-method-factory.ts
index dea46c62f..d9b9a5d97 100644
--- a/packages/core/helpers/router-method-factory.ts
+++ b/packages/core/helpers/router-method-factory.ts
@@ -18,8 +18,10 @@ export class RouterMethodFactory {
         return target.options;
       case RequestMethod.HEAD:
         return target.head;
-      default: {
+      case RequestMethod.GET:
         return target.get;
+      default: {
+        return target.use;
       }
     }
   }
diff --git a/packages/core/middleware/builder.ts b/packages/core/middleware/builder.ts
index a91154da1..d9d63f20f 100644
--- a/packages/core/middleware/builder.ts
+++ b/packages/core/middleware/builder.ts
@@ -10,7 +10,6 @@ import {
 } from '@nestjs/common/interfaces/middleware';
 import { MiddlewareConfiguration } from '@nestjs/common/interfaces/middleware/middleware-configuration.interface';
 import { iterate } from 'iterare';
-import { NestContainer } from '../injector';
 import { RoutesMapper } from './routes-mapper';
 import { filterMiddleware } from './utils';
 
@@ -20,7 +19,6 @@ export class MiddlewareBuilder implements MiddlewareConsumer {
   constructor(
     private readonly routesMapper: RoutesMapper,
     private readonly httpAdapter: HttpServer,
-    private readonly container: NestContainer,
   ) {}
 
   public apply(
diff --git a/packages/core/middleware/middleware-module.ts b/packages/core/middleware/middleware-module.ts
index 0f229d623..b02d081f7 100644
--- a/packages/core/middleware/middleware-module.ts
+++ b/packages/core/middleware/middleware-module.ts
@@ -91,7 +91,6 @@ export class MiddlewareModule {
     const middlewareBuilder = new MiddlewareBuilder(
       this.routesMapper,
       this.httpAdapter,
-      this.container,
     );
     await instance.configure(middlewareBuilder);
 
diff --git a/packages/core/middleware/routes-mapper.ts b/packages/core/middleware/routes-mapper.ts
index 5e9ef6e46..ce4d246e1 100644
--- a/packages/core/middleware/routes-mapper.ts
+++ b/packages/core/middleware/routes-mapper.ts
@@ -1,4 +1,3 @@
-import { RequestMethod } from '@nestjs/common';
 import { MODULE_PATH, PATH_METADATA } from '@nestjs/common/constants';
 import { RouteInfo, Type } from '@nestjs/common/interfaces';
 import {
@@ -23,10 +22,11 @@ export class RoutesMapper {
     route: Type<any> | RouteInfo | string,
   ): RouteInfo[] {
     if (isString(route)) {
+      const defaultRequestMethod = -1;
       return [
         {
           path: addLeadingSlash(route),
-          method: RequestMethod.ALL,
+          method: defaultRequestMethod,
         },
       ];
     }
@@ -83,7 +83,7 @@ export class RoutesMapper {
   private getHostModuleOfController(
     metatype: Type<unknown>,
   ): Module | undefined {
-    if (!metatype?.name) {
+    if (!metatype) {
       return;
     }
     const modulesContainer = this.container.getModules();
@@ -95,7 +95,7 @@ export class RoutesMapper {
     const modules = Array.from(modulesContainer.values()).filter(moduleRef =>
       moduleRefsSet.has(moduleRef),
     );
-    return modules.find(({ routes }) => routes.has(metatype.name));
+    return modules.find(({ routes }) => routes.has(metatype));
   }
 
   private getModulePath(
diff --git a/packages/core/middleware/utils.ts b/packages/core/middleware/utils.ts
index 0ebd282bf..3b18e5b60 100644
--- a/packages/core/middleware/utils.ts
+++ b/packages/core/middleware/utils.ts
@@ -2,9 +2,9 @@
 import { RequestMethod } from '@nestjs/common';
 import { HttpServer, RouteInfo, Type } from '@nestjs/common/interfaces';
 import { isFunction } from '@nestjs/common/utils/shared.utils';
+import { iterate } from 'iterare';
 import * as pathToRegexp from 'path-to-regexp';
 import { v4 as uuid } from 'uuid';
-import { iterate } from 'iterare';
 
 type RouteInfoRegex = RouteInfo & { regex: RegExp };
 
@@ -85,7 +85,11 @@ export function isRouteExcluded(
       : originalUrl;
 
   const isExcluded = excludedRoutes.some(({ method, regex }) => {
-    if (RequestMethod.ALL === method || RequestMethod[method] === reqMethod) {
+    if (
+      RequestMethod.ALL === method ||
+      RequestMethod[method] === reqMethod ||
+      method === -1
+    ) {
       return regex.exec(pathname);
     }
     return false;
diff --git a/packages/core/test/helpers/router-method-factory.spec.ts b/packages/core/test/helpers/router-method-factory.spec.ts
index 17e0231b3..242fc51a3 100644
--- a/packages/core/test/helpers/router-method-factory.spec.ts
+++ b/packages/core/test/helpers/router-method-factory.spec.ts
@@ -29,5 +29,6 @@ describe('RouterMethodFactory', () => {
     expect(factory.get(target, RequestMethod.PATCH)).to.equal(target.patch);
     expect(factory.get(target, RequestMethod.OPTIONS)).to.equal(target.options);
     expect(factory.get(target, RequestMethod.HEAD)).to.equal(target.head);
+    expect(factory.get(target, -1)).to.equal(target.use);
   });
 });
diff --git a/packages/core/test/middleware/builder.spec.ts b/packages/core/test/middleware/builder.spec.ts
index 5e8f96155..1cc6e144d 100644
--- a/packages/core/test/middleware/builder.spec.ts
+++ b/packages/core/test/middleware/builder.spec.ts
@@ -1,4 +1,3 @@
-import { RequestMethod } from '@nestjs/common';
 import { expect } from 'chai';
 import { Controller, Get } from '../../../common';
 import { NestContainer } from '../../injector/container';
@@ -14,7 +13,6 @@ describe('MiddlewareBuilder', () => {
     builder = new MiddlewareBuilder(
       new RoutesMapper(container),
       new NoopHttpAdapter({}),
-      container,
     );
   });
   describe('apply', () => {
@@ -65,7 +63,7 @@ describe('MiddlewareBuilder', () => {
       expect(proxy.getExcludedRoutes()).to.be.eql([
         {
           path,
-          method: RequestMethod.ALL,
+          method: -1,
         },
       ]);
     });
diff --git a/packages/core/test/middleware/middleware-module.spec.ts b/packages/core/test/middleware/middleware-module.spec.ts
index 293540b16..20be3c454 100644
--- a/packages/core/test/middleware/middleware-module.spec.ts
+++ b/packages/core/test/middleware/middleware-module.spec.ts
@@ -75,7 +75,6 @@ describe('MiddlewareModule', () => {
           new MiddlewareBuilder(
             (middlewareModule as any).routesMapper,
             undefined,
-            stubContainer,
           ),
         ),
       ).to.be.true;
diff --git a/packages/platform-fastify/adapters/fastify-adapter.ts b/packages/platform-fastify/adapters/fastify-adapter.ts
index 60f1a8b4f..5f957540e 100644
--- a/packages/platform-fastify/adapters/fastify-adapter.ts
+++ b/packages/platform-fastify/adapters/fastify-adapter.ts
@@ -312,7 +312,8 @@ export class FastifyAdapter<
           }
           if (
             requestMethod === RequestMethod.ALL ||
-            req.method === RequestMethod[requestMethod]
+            req.method === RequestMethod[requestMethod] ||
+            requestMethod === -1
           ) {
             return callback(req, res, next);
           }
diff --git a/packages/platform-socket.io/adapters/io-adapter.ts b/packages/platform-socket.io/adapters/io-adapter.ts
index 9699de967..22eb9155c 100644
--- a/packages/platform-socket.io/adapters/io-adapter.ts
+++ b/packages/platform-socket.io/adapters/io-adapter.ts
@@ -6,13 +6,13 @@ import {
 import { DISCONNECT_EVENT } from '@nestjs/websockets/constants';
 import { fromEvent, Observable } from 'rxjs';
 import { filter, first, map, mergeMap, share, takeUntil } from 'rxjs/operators';
-import * as io from 'socket.io';
+import { Server, ServerOptions, Socket } from 'socket.io';
 
 export class IoAdapter extends AbstractWsAdapter {
   public create(
     port: number,
-    options?: any & { namespace?: string; server?: any },
-  ): any {
+    options?: ServerOptions & { namespace?: string; server?: any },
+  ): Server {
     if (!options) {
       return this.createIOServer(port);
     }
@@ -26,23 +26,23 @@ export class IoAdapter extends AbstractWsAdapter {
 
   public createIOServer(port: number, options?: any): any {
     if (this.httpServer && port === 0) {
-      return io(this.httpServer, options);
+      return new Server(this.httpServer, options);
     }
-    return io(port, options);
+    return new Server(port, options);
   }
 
   public bindMessageHandlers(
-    client: any,
+    socket: Socket,
     handlers: MessageMappingProperties[],
     transform: (data: any) => Observable<any>,
   ) {
-    const disconnect$ = fromEvent(client, DISCONNECT_EVENT).pipe(
+    const disconnect$ = fromEvent(socket, DISCONNECT_EVENT).pipe(
       share(),
       first(),
     );
 
     handlers.forEach(({ message, callback }) => {
-      const source$ = fromEvent(client, message).pipe(
+      const source$ = fromEvent(socket, message).pipe(
         mergeMap((payload: any) => {
           const { data, ack } = this.mapPayload(payload);
           return transform(callback(data, ack)).pipe(
@@ -54,17 +54,17 @@ export class IoAdapter extends AbstractWsAdapter {
       );
       source$.subscribe(([response, ack]) => {
         if (response.event) {
-          return client.emit(response.event, response.data);
+          return socket.emit(response.event, response.data);
         }
         isFunction(ack) && ack(response);
       });
     });
   }
 
-  public mapPayload(payload: any): { data: any; ack?: Function } {
+  public mapPayload(payload: unknown): { data: any; ack?: Function } {
     if (!Array.isArray(payload)) {
       if (isFunction(payload)) {
-        return { data: undefined, ack: payload };
+        return { data: undefined, ack: payload as Function };
       }
       return { data: payload };
     }
diff --git a/packages/websockets/interfaces/gateway-metadata.interface.ts b/packages/websockets/interfaces/gateway-metadata.interface.ts
index 9ee0c2987..977909f45 100644
--- a/packages/websockets/interfaces/gateway-metadata.interface.ts
+++ b/packages/websockets/interfaces/gateway-metadata.interface.ts
@@ -1,97 +1,122 @@
 /**
- * @external https://github.com/DefinitelyTyped/DefinitelyTyped/blob/master/types/socket.io/index.d.ts
+ * @external https://github.com/socketio/socket.io/blob/master/lib/index.ts
  */
 
+import { CorsOptions } from '@nestjs/common/interfaces/external/cors-options.interface';
+
 export interface GatewayMetadata {
   /**
    * The name of a namespace
    */
   namespace?: string | RegExp;
-
   /**
-   * The path to ws
-   * @default '/socket.io'
+   * Name of the path to capture
+   * @default "/socket.io"
    */
   path?: string;
-
   /**
-   * Should we serve the client file?
+   * Whether to serve the client files
    * @default true
    */
   serveClient?: boolean;
-
   /**
-   * The adapter to use for handling rooms. NOTE: this should be a class,
-   * not an object
-   * @default typeof Adapter
+   * The adapter to use
+   * @default the in-memory adapter (https://github.com/socketio/socket.io-adapter)
    */
   adapter?: any;
-
   /**
-   * Accepted origins
-   * @default '*:*'
+   * The parser to use
+   * @default the default parser (https://github.com/socketio/socket.io-parser)
    */
-  origins?: string;
-
   parser?: any;
-
   /**
-   * How many milliseconds without a pong packed to consider the connection closed (engine.io)
-   * @default 60000
+   * How many ms before a client without namespace is closed
+   * @default 45000
+   */
+  connectTimeout?: number;
+  /**
+   * How many ms without a pong packet to consider the connection closed
+   * @default 5000
    */
   pingTimeout?: number;
-
   /**
-   * How many milliseconds before sending a new ping packet (keep-alive) (engine.io)
+   * How many ms before sending a new ping packet
    * @default 25000
    */
   pingInterval?: number;
-
   /**
-   * How many bytes or characters a message can be when polling, before closing the session
-   * (to avoid Dos) (engine.io)
-   * @default 10E7
+   * How many ms before an uncompleted transport upgrade is cancelled
+   * @default 10000
+   */
+  upgradeTimeout?: number;
+  /**
+   * How many bytes or characters a message can be, before closing the session (to avoid DoS).
+   * @default 1e5 (100 KB)
    */
   maxHttpBufferSize?: number;
-
   /**
-   * Transports to allow connections to (engine.io)
-   * @default ['polling','websocket']
+   * A function that receives a given handshake or upgrade request as its first parameter,
+   * and can decide whether to continue or not. The second argument is a function that needs
+   * to be called with the decided information: fn(err, success), where success is a boolean
+   * value where false means that the request is rejected, and err is an error code.
    */
-  transports?: string[];
-
+  allowRequest?: (
+    req: any,
+    fn: (err: string | null | undefined, success: boolean) => void,
+  ) => void;
   /**
-   * Whether to allow transport upgrades (engine.io)
+   * The low-level transports that are enabled
+   * @default ["polling", "websocket"]
+   */
+  transports?: Transport[];
+  /**
+   * Whether to allow transport upgrades
    * @default true
    */
   allowUpgrades?: boolean;
-
   /**
-   * parameters of the WebSocket permessage-deflate extension (see ws module).
-   * Set to false to disable (engine.io)
+   * Parameters of the WebSocket permessage-deflate extension (see ws module api docs). Set to false to disable.
+   * @default false
+   */
+  perMessageDeflate?: boolean | object;
+  /**
+   * Parameters of the http compression for the polling transports (see zlib api docs). Set to false to disable.
    * @default true
    */
-  perMessageDeflate?: Record<string, any> | boolean;
-
+  httpCompression?: boolean | object;
   /**
-   * Parameters of the http compression for the polling transports (see zlib).
-   * Set to false to disable, or set an object with parameter "threshold:number"
-   * to only compress data if the byte size is above this value (1024) (engine.io)
-   * @default true|1024
+   * What WebSocket server implementation to use. Specified module must
+   * conform to the ws interface (see ws module api docs). Default value is ws.
+   * An alternative c++ addon is also available by installing uws module.
    */
-  httpCompression?: Record<string, any> | boolean;
-
+  wsEngine?: string;
   /**
-   * Name of the HTTP cookie that contains the client sid to send as part of
-   * handshake response headers. Set to false to not send one (engine.io)
-   * @default "io"
+   * An optional packet which will be concatenated to the handshake packet emitted by Engine.IO.
    */
-  cookie?: string | boolean;
-
+  initialPacket?: any;
   /**
-   * Whether to let engine.io handle the OPTIONS requests.
-   * You can also pass a custom function to handle the requests
+   * Configuration of the cookie that contains the client sid to send as part of handshake response headers. This cookie
+   * might be used for sticky-session. Defaults to not sending any cookie.
+   * @default false
+   */
+  cookie?: any | boolean;
+  /**
+   * The options that will be forwarded to the cors module
+   */
+  cors?: CorsOptions;
+  /**
+   * Whether to enable compatibility with Socket.IO v2 clients
+   * @default false
+   */
+  allowEIO3?: boolean;
+  /**
+   * Destroy unhandled upgrade requests
    * @default true
    */
-  handlePreflightRequest?: ((req: any, res: any) => void) | boolean;
+  destroyUpgrade?: boolean;
+  /**
+   * Milliseconds after which unhandled requests are ended
+   * @default 1000
+   */
+  destroyUpgradeTimeout?: number;
 }