---
title: "CAT 0.10.0"
description: "CAT release notes 0.10.0"
url: "https://docs.justcat.it/release-notes/archive/0.10.0/"
---
# CAT 0.10.0


## Environment Variables

You can  now use environment variables in project files. No need to use passwords in plain text. More details about that can be found here:

[How to Work with Passwords](https://docs.justcat.it/how-to-guides/organize-and-run-tests/work-with-secrets/ "test")

__TLDR__: You can define an environment variable and use it in data source definitions like this:

```yaml
Data Sources:
- Provider: SqlServer@1
  Connection String: '%EnvironmentVariableName%'
  Name: DWH
```

Replacing environment variables works when you are reading data sources (but not tests!) from any provider.

## How-to Guides

Added a new how-to guide, see above. More will follow.