Add release version
# Couper Changelog
-## [Unreleased](https://github.com/avenga/couper/compare/v1.9.0...master)
+## [Unreleased](https://github.com/avenga/couper/compare/v1.9.1...master)
Unreleased changes are available as `avenga/couper:edge` container.
+---
+
+## [1.9.1](https://github.com/avenga/couper/releases/tag/v1.9.1)
+
* **Fixed**
* Missing environment key error while using multiple configuration files ([#522](https://github.com/avenga/couper/pull/522))
----
-
## [1.9.0](https://github.com/avenga/couper/releases/tag/v1.9.0)
Couper 1.9 is a feature release bringing more comfort and enhanced stability to
