diff --git a/rest-api-guidelines/core-principles/openapi-specification.md b/rest-api-guidelines/core-principles/openapi-specification.md
index 015cd9f..fe7c56d 100644
--- a/rest-api-guidelines/core-principles/openapi-specification.md
+++ b/rest-api-guidelines/core-principles/openapi-specification.md
@@ -1,10 +1,10 @@
 # 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) OR the[OpenAPI Specification \(formerly known as Swagger Specification\) version 3.0.x](https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.3.md).
+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) OR the [OpenAPI Specification \(formerly known as Swagger Specification\) version 3.0.x](https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.3.md).
 
 Every API description **MUST** be published in adidas [API design platform](design-platform.md) and it **SHOULD** be stored in version control system \(Bitbucket, GitHub\) in the same repository as the API implementation.
 
 ## Language
 
-The API description MUST be written in **American English**.
+The API description **MUST** be written in **American English**.