diff --git a/src/angular2-token.model.ts b/src/angular2-token.model.ts
index 16fc2438..f06597b0 100644
--- a/src/angular2-token.model.ts
+++ b/src/angular2-token.model.ts
@@ -65,6 +65,7 @@ export interface GlobalOptions {
 export interface Angular2TokenOptions {
     apiBase?:                   string;
     apiPath?:                   string;
+    hostUrl?:                   string;
 
     signInPath?:                string;
     signInRedirect?:            string;
@@ -92,4 +93,4 @@ export interface Angular2TokenOptions {
     oAuthWindowOptions?:        { [key:string]: string; };
 
     globalOptions?:             GlobalOptions;
-}
\ No newline at end of file
+}
diff --git a/src/angular2-token.service.ts b/src/angular2-token.service.ts
index ecd65a14..04fde8c1 100644
--- a/src/angular2-token.service.ts
+++ b/src/angular2-token.service.ts
@@ -1,5 +1,6 @@
-import { Injectable, Optional } from '@angular/core';
+import { Inject, Injectable, Optional, PLATFORM_ID } from '@angular/core';
 import { ActivatedRoute, Router, CanActivate } from '@angular/router';
+import { isPlatformBrowser } from '@angular/common';
 import {
     Http,
     Response,
@@ -70,7 +71,8 @@ export class Angular2TokenService implements CanActivate {
     constructor(
         private http: Http,
         @Optional() private activatedRoute: ActivatedRoute,
-        @Optional() private router: Router
+        @Optional() private router: Router,
+        @Inject(PLATFORM_ID) protected platformId: Object
     ) { }
 
     userSignedIn(): boolean {
@@ -82,7 +84,7 @@ export class Angular2TokenService implements CanActivate {
             return true;
         else {
             // Store current location in storage (usefull for redirection after signing in)
-            if (this.atOptions.signInStoredUrlStorageKey) {
+            if (this.atOptions.signInStoredUrlStorageKey && isPlatformBrowser(this.platformId)) {
                 localStorage.setItem(
                     this.atOptions.signInStoredUrlStorageKey,
                     window.location.pathname + window.location.search
@@ -103,6 +105,7 @@ export class Angular2TokenService implements CanActivate {
         let defaultOptions: Angular2TokenOptions = {
             apiPath:                    null,
             apiBase:                    null,
+            hostUrl:                    null,
 
             signInPath:                 'auth/sign_in',
             signInRedirect:             null,
@@ -114,16 +117,16 @@ export class Angular2TokenService implements CanActivate {
 
             registerAccountPath:        'auth',
             deleteAccountPath:          'auth',
-            registerAccountCallback:    window.location.href,
+            registerAccountCallback:    isPlatformBrowser(this.platformId) ? window.location.href : null,
 
             updatePasswordPath:         'auth',
 
             resetPasswordPath:          'auth/password',
-            resetPasswordCallback:      window.location.href,
+            resetPasswordCallback:      isPlatformBrowser(this.platformId) ? window.location.href : null,
 
             userTypes:                  null,
 
-            oAuthBase:                  window.location.origin,
+            oAuthBase:                  isPlatformBrowser(this.platformId) ? window.location.origin : null,
             oAuthPaths: {
                 github:                 'auth/github'
             },
@@ -369,8 +372,9 @@ export class Angular2TokenService implements CanActivate {
         let baseHeaders:        { [key:string]: string; } = this.atOptions.globalOptions.headers;
 
         // Get auth data from local storage
-        this.getAuthDataFromStorage();
-        
+        if (isPlatformBrowser(this.platformId))
+            this.getAuthDataFromStorage();
+
         // Merge auth headers to request if set
         if (this.atCurrentAuthData != null) {
             (<any>Object).assign(baseHeaders, {
@@ -422,13 +426,14 @@ export class Angular2TokenService implements CanActivate {
 
     // Try to load auth data
     private tryLoadAuthData(): void {
+        if (isPlatformBrowser(this.platformId)) {
+            let userType = this.getUserTypeByName(localStorage.getItem('userType'));
 
-        let userType = this.getUserTypeByName(localStorage.getItem('userType'));
-
-        if (userType)
-            this.atCurrentUserType = userType;
+            if (userType)
+                this.atCurrentUserType = userType;
 
-        this.getAuthDataFromStorage();
+            this.getAuthDataFromStorage();
+        }
 
         if(this.activatedRoute)
             this.getAuthDataFromParams();
diff --git a/src/tsconfig.json b/src/tsconfig.json
index 5a56436d..48f2b951 100644
--- a/src/tsconfig.json
+++ b/src/tsconfig.json
@@ -1,7 +1,7 @@
 {
     "compilerOptions": {
         "target": "es5",
-        "module": "es2015",
+        "module": "commonjs",
         "emitDecoratorMetadata": true,
         "experimentalDecorators": true,
         "moduleResolution": "node",
@@ -33,4 +33,4 @@
     "angularCompilerOptions": {
         "genDir": "../lib"
     }
-}
\ No newline at end of file
+}