> For the complete documentation index, see [llms.txt](https://docs.wproofreader.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.wproofreader.com/v6.12.0/integrations/how-tos/versioning-with-jsdelivr.md).

# Versioning with jsDelivr

Even though it is highly recommended to always use the latest version of WProofreader package (wscbundle.js), there might be exceptions to this rule.

Rarely we can introduce drastic changes to the user interface or overall user experience. Thus, it might require extra time for existing customers to adapt to changes.

In the initialization of WProofreader, you are required to specify the path to **wscbundle.js** script. Its default and recommended path is below.

Path to the latest version:

```javascript
<script type="text/javascript" src="https://svc.webspellchecker.net/spellcheck31/wscbundle/wscbundle.js"></script>
```

An example of a specific version of **wscbunle.js** using [jsDelivr](https://www.jsdelivr.com/) CDN.

```javascript
<script src='https://cdn.jsdelivr.net/gh/WebSpellChecker/wproofreader@5.7.1.1/wscbundle/wscbundle.js'></script>
```

Select the required release tag from the open [WProofreader repository](https://github.com/WebSpellChecker/wproofreader/tags). The scope of changes in each release will be available on the [public changelog](https://github.com/WebSpellChecker/wproofreader/blob/master/CHANGELOG.md).

2\. Make sure you have the additional service endpoint (serviceProtocol, serviceHost, servicePort, servicePath) [parameters](https://webspellchecker.com/docs/api/wscbundle/Options.html) explicitly specified in the configuration script as shown below.

```javascript
...
serviceProtocol:'http',
serviceHost:'svc.webspellchecker.net',
servicePort:'443',
servicePath:'spellcheck31/api'
...
```

Otherwise, you might receive an error like this:

{% hint style="warning" %}
“CORS response parsing error: SyntaxError: Unexpected token 'M', "Method Not Allowed" is not valid JSON”.
{% endhint %}