This is applied for WSO2 API Management 4.1.0
Update the file <code>deployment.toml</code> following portion:
<pre><code>[apim.throttling]
enable_policy_deploy = true
</code></pre>Restart the API Management instance, then try to attach a particular policy such as add a certain header in to the request
<img src="https://cdn.hashnode.com/res/hashnode/image/upload/v1659070009941/Sx4xJs6FF.png" alt="image.png" />
Deploy the revision to the gateway and try it

This is applied for WSO2 API Management 4.1.0

Update the file `deployment.toml` following portion:
```
[apim.throttling]
enable_policy_deploy = true
```
Restart the API Management instance, then try to attach a particular policy such as add a certain header in to the request

![image.png](https://cdn.hashnode.com/res/hashnode/image/upload/v1659070009941/Sx4xJs6FF.png align="left")

Deploy the revision to the gateway and try it


Configure WSO2 API Manager to use policies