# How to configure Textual environment variables

On a self-hosted instance of Textual, much of the configuration takes the form of environment variables.

After you configure an environment variable, you must restart Textual.

### **​​Docker**

For Docker, add the variable to **.env** in the format:

`SETTING_NAME=value`

After you update **.env**, to restart Textual and complete the update, run:

`$ docker-compose down`

`$ docker-compose pull && docker-compose up -d`

### **Kubernetes**

For Kubernetes, in **values.yaml**, add the environment variable to the appropriate `env` section of the Helm chart.

For example:

```
env: {
  "TEXTUAL_ML_WORKERS": "2"
}
```

After you update the YAML file, to restart the service and complete the update, run:

`$ helm upgrade <name_of_release> -n <namespace_name> <path-to-helm-chart>`

The above Helm upgrade command is always safe to use when you provide specific version numbers. However, if you use the latest tag, it might result in Textual containers that have different versions.


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