Django - invalid http_host header you may need to add to allowed_hosts

Invalid http_host header you may need to add to allowed_hosts [Solution]

To resolve this error, you need to add the correct Host value to the ALLOWED_HOSTS setting. Here's how:

1. Open the settings.py file in your Django project.
2. Find the ALLOWED_HOSTS setting and add your HOST value there. If you are using 127.0.0.1 as a host then you can use - ALLOWED_HOSTS = ['127.0.0.1'].

If you are using localhost as your host then you can change your file as below.

settings.py

ALLOWED_HOSTS = ["localhost", "127.0.0.1"]

Add the correct Host value to the list. For example, if your website's domain is mywebsite.com, you would add it like this:

ALLOWED_HOSTS = ['mywebsite.com']

If your website has multiple subdomains, you may also need to add those to the list. For example:

ALLOWED_HOSTS = ['mywebsite.com', 'www.mywebsite.com', 'subdomain.mywebsite.com']

Save the settings.py file and restart your Django development server. The invalid http_host header error should be resolved.

Note: Be sure to use the correct domain and subdomain names in the ALLOWED_HOSTS setting, as this is a critical security feature. If you're not sure what values to use, check with your web hosting provider or DNS administrator.