diff --git a/package.json b/package.json
index ea4f9ec..46c14fe 100644
--- a/package.json
+++ b/package.json
@@ -23,23 +23,18 @@
     "socket.io-client": "^2.0.2"
   },
   "devDependencies": {
-     "@angular/common": "^4.1.3",
+    "@angular/common": "^4.1.3",
     "@angular/compiler": "^4.1.3",
+    "@angular/compiler-cli": "^4.1.3",
     "@angular/core": "^4.1.3",
     "@angular/platform-browser": "^4.1.3",
     "@angular/platform-browser-dynamic": "^4.1.3",
-    "@types/socket.io-client": "^1.4.29",
-    "core-js": "^2.4.1",
-    "reflect-metadata": "^0.1.10",
-    "rxjs": "^5.0.1",
-    "socket.io": "^1.7.3",
-    "ts-helpers": "^1.1.1",
-    "zone.js": "^0.7.2",
-    "@angular/compiler-cli": "^4.1.3",
     "@types/jasmine": "2.5.38",
     "@types/node": "^6.0.63",
     "@types/socket.io": "^1.4.28",
+    "@types/socket.io-client": "^1.4.29",
     "codelyzer": "~2.0.0-beta.1",
+    "core-js": "^2.4.1",
     "es6-shim": "^0.35.3",
     "jasmine": "^2.5.3",
     "jasmine-core": "2.5.2",
@@ -50,10 +45,15 @@
     "karma-jasmine": "^1.0.2",
     "karma-remap-istanbul": "^0.2.1",
     "protractor": "~4.0.13",
+    "reflect-metadata": "^0.1.10",
+    "rxjs": "^5.0.1",
     "server-destroy": "^1.0.1",
+    "socket.io": "^1.7.3",
     "socket.io-client": "^2.0.2",
+    "ts-helpers": "^1.1.1",
     "ts-node": "1.2.1",
     "tslint": "^4.3.0",
-    "typescript": "^2.3.4"
+    "typescript": "^2.3.4",
+    "zone.js": "^0.8.16"
   }
 }
diff --git a/socket-io.module.ts b/socket-io.module.ts
index 288ffe2..ec3715e 100644
--- a/socket-io.module.ts
+++ b/socket-io.module.ts
@@ -1,4 +1,4 @@
-import { NgModule, ModuleWithProviders } from '@angular/core';
+import { NgModule, ModuleWithProviders, InjectionToken } from '@angular/core';
 
 import { WrappedSocket } from './socket-io.service';
 import { SocketIoConfig } from './socketIoConfig';
@@ -9,7 +9,7 @@ export function SocketFactory(config: SocketIoConfig) {
     return new WrappedSocket(config);
 }
 
-export const socketConfig: string = "__SOCKET_IO_CONFIG__";
+export const SOCKET_CONFIG_TOKEN = new InjectionToken<SocketIoConfig>('__SOCKET_IO_CONFIG__');
 
 @NgModule({})
 export class SocketIoModule {
@@ -17,11 +17,11 @@ export class SocketIoModule {
         return {
             ngModule: SocketIoModule,
             providers: [
-                { provide: socketConfig, useValue: config },
+                { provide: SOCKET_CONFIG_TOKEN, useValue: config },
                 { 
                     provide: WrappedSocket,
                     useFactory: SocketFactory,
-                    deps : [socketConfig]
+                    deps : [SOCKET_CONFIG_TOKEN]
                 }
             ]
         };
diff --git a/socket-io.service.ts b/socket-io.service.ts
index bcfa713..acf4947 100644
--- a/socket-io.service.ts
+++ b/socket-io.service.ts
@@ -1,17 +1,18 @@
-import { Injectable, EventEmitter } from '@angular/core';
+import { Injectable, EventEmitter, Inject } from '@angular/core';
 import { Observable } from 'rxjs/Observable';
 import 'rxjs/add/operator/share'; 
 
 import * as io from 'socket.io-client';
 
 import { SocketIoConfig } from './socketIoConfig';
+import { SOCKET_CONFIG_TOKEN } from './socket-io.module';
 
 @Injectable()
 export class WrappedSocket {
-    subscribersCounter : number = 0;
+    subscribersCounter = 0;
     ioSocket: any;
 
-    constructor(config: SocketIoConfig) {
+    constructor(@Inject(SOCKET_CONFIG_TOKEN) config: SocketIoConfig) {
         const url: string = config.url || '';
         const options: any = config.options || {};
         this.ioSocket = io(url, options);