diff --git a/core-principles/openapi-specification.md b/core-principles/openapi-specification.md
index 196126c..c54f215 100644
--- a/core-principles/openapi-specification.md
+++ b/core-principles/openapi-specification.md
@@ -1,5 +1,6 @@
 # OpenAPI Specification
 Every API **MUST** be described using an API description format. The API description format used MUST be the [OpenAPI Specification (formerly known as Swagger Specification) version 2.0](https://github.com/OAI/OpenAPI-Specification/blob/master/versions/2.0.md).
+
 Every API description **MUST** be published in adidas [API design platform](./apiary.md) and it **SHOULD** be stored in version control system (Bitbucket, GitHub) in the same repository as the API implementation.
 
 ## Language