diff --git a/CHANGELOG.md b/CHANGELOG.md
index 43f4811..4953412 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,13 +1,33 @@
-# 0.3.0-beta1
+# CHANGELOG 
+
+## 0.5.0-beta.5
+
+Raise error in case of calling a non existing method ([commit 77cf177](https://github.com/lula/ngx-soap/commit/77cf1772c4d042872b3326b28993bcbb0a5182c4))
+
+## 0.5.0-beta.4
+
+Use Angular HttpClient.
+Observables used wherever possible.
+
+this.soap.createClient('assets/calculator.wsdl').subscribe(client => this.client = client);
+
+(<any>this.client).Add(body).subscribe((res: ISoapMethodResponse) => this.message = res.result.AddResult);
+
+this.client.call('Add', body).subscribe((res: ISoapMethodResponse) => this.message = res.result.AddResult);
+
+## 0.3.0-beta1
+
 Project recreated with Angualr 6 CLI.
 
 ...
 
-# 0.2.2-beta6
+## 0.2.2-beta6
 Call operation with client method.
 
-# 0.2.2-beta3
+## 0.2.2-beta3
+
 ### Breaking Changes
+
 Web Service operations have no callback anymore. Callback has been replaced by a Promise.
 
 Before: 
@@ -20,8 +40,10 @@ After:
       // or
       (client as any).Add(body).then((operation: Operation) => ... )
 
-# 0.2.1
+## 0.2.1
+
 AOT compilation fixes (issue #1)
 
-# 0.1.4
+## 0.1.4
+
 Initial version
diff --git a/projects/ngx-soap/README.md b/projects/ngx-soap/README.md
index 5ba4d13..9b3aeb9 100644
--- a/projects/ngx-soap/README.md
+++ b/projects/ngx-soap/README.md
@@ -8,21 +8,47 @@ Project has been recreated from scratch with Angualr 6 CLI.
 
 1. install ngx-soap and dependencies
 
-    `npm install --save ngx-soap buffer concat-stream core-js crypto-browserify events lodash sax stream uuid`
-2. Add NgxSoapModule to your app module like:
+    `npm install --save ngx-soap`
+
+    `npm install --save buffer concat-stream core-js crypto-js events lodash sax stream uuid`
+
+2. Add NgxSoapModule to your app module
+
     ```
     import { NgxSoapModule } from 'ngx-soap';
     ...
         @NgModule({
-            imports: [ NgxSoapModule, ... ]
+            imports: [ ..., NgxSoapModule, ... ]
         ...
     ```
+    
+3. Inject NgxSoapService in your component:
 
-## Local tests
-
-1. `git clone -b angular6-cli-ilb https://github.com/lula/ngx-soap.git`
-2. `cd ngx-soap && npm install`
-3. `ng build ngx-soap`
-4. `ng serve`
-
-See example app under `src/app`
\ No newline at end of file
+    ```
+    ...
+    import { NgxSoapService, Client, ISoapMethodResponse } from 'ngx-soap';
+    ...
+    
+    @Component({
+      selector: 'app-root',
+      templateUrl: './app.component.html',
+      styleUrls: ['./app.component.css']
+    })
+    export class AppComponent {
+        client: Client;
+        intA = 2;
+        intB = 3;
+        
+        constructor(private soap: NgxSoapService) {
+            this.soap.createClient('assets/calculator.wsdl').subscribe(client => this.client = client);
+        }
+        
+        sum() {
+            const body = {
+              intA: this.intA,
+              intB: this.intB
+            };
+            (<any>this.client).Add(body).subscribe((res: ISoapMethodResponse) => this.message = res.result.AddResult);
+        }
+    }
+    ```
diff --git a/projects/ngx-soap/package.json b/projects/ngx-soap/package.json
index a8d0d11..e1701ee 100644
--- a/projects/ngx-soap/package.json
+++ b/projects/ngx-soap/package.json
@@ -1,6 +1,6 @@
 {
   "name": "ngx-soap",
-  "version": "0.5.0-beta.4",
+  "version": "0.5.0-beta.5",
   "peerDependencies": {
     "@angular/common": "^6.0.0-rc.0 || ^6.0.0",
     "@angular/core": "^6.0.0-rc.0 || ^6.0.0",