diff --git a/asynchronous-api-guidelines/index.md b/asynchronous-api-guidelines/index.md
index 3c802e1..7dc9b89 100644
--- a/asynchronous-api-guidelines/index.md
+++ b/asynchronous-api-guidelines/index.md
@@ -1,10 +1,8 @@
 ## Asynchronous API Guidelines
 
-* Preliminary concepts
-  * [Introduction](asynchronous-api-guidelines/01_introduction/a_introduction.md)
-  * [Basic concepts](asynchronous-api-guidelines/01_introduction/b_basic_concepts.md)
+* [Introduction to guidelines](asynchronous-api-guidelines/01_introduction/a_introduction.md)
+* [Basic concepts](asynchronous-api-guidelines/01_introduction/b_basic_concepts.md)
 * [General guidelines for asynchronous APIs](asynchronous-api-guidelines/02_asynchronous_api_guidelines/main.md)
-* AsyncAPI specs for Kafka
-  * [Introduction](asynchronous-api-guidelines/03_asyncapi_kafka_specs/a_introduction.md)
-  * [Guidelines](asynchronous-api-guidelines/03_asyncapi_kafka_specs/b_guidelines.md)
-  * [Tooling](asynchronous-api-guidelines/03_asyncapi_kafka_specs/c_tooling.md)
\ No newline at end of file
+* [Introduction to AsyncAPI specs for Kafka](asynchronous-api-guidelines/03_asyncapi_kafka_specs/a_introduction.md)
+* [Guidelines for AsyncAPI specs for Kafka](asynchronous-api-guidelines/03_asyncapi_kafka_specs/b_guidelines.md)
+* [Tooling for AsyncAPI](asynchronous-api-guidelines/03_asyncapi_kafka_specs/c_tooling.md)