diff --git a/async-message-resources.adoc b/async-message-resources.adoc
index c3dc678..2c450c5 100644
--- a/async-message-resources.adoc
+++ b/async-message-resources.adoc
@@ -1,10 +1,10 @@
 # Async Message Resources
 
-### The Protocol
+#### The Protocol
 http://docs.oasis-open.org/amqp/core/v1.0/amqp-core-complete-v1.0.pdf 
  <= AMQP Core Complete v1.0 (pdf) +
  
-### Rabbit AMQP
+#### Rabbit AMQP
 https://rabbitmq.com/reliability.html
  <= +
 https://rabbitmq.com/download.html
@@ -18,17 +18,17 @@ https://rabbitmq.com/configure.html
 https://rabbitmq.com/queues.html
  <= +
  
-### Apache QPID
+#### Apache QPID
 https://qpid.apache.org/index.html
  <= +
  
-### Intros and Tutorials
+#### Intros and Tutorials
 https://ably.com/topic/intro-to-amqp-1-0
  <= +
 https://jstobigdata.com/rabbitmq/complete-rabbitmq-tutorial-in-java/
  <= +
  
-### Challenges: Ordering of Event
+#### Challenges: Ordering of Event
 https://medium.com/baseds/ordering-distributed-events-29c1dd9d1eff
  <= + 
 https://medium.com/baseds/logical-time-and-lamport-clocks-part-1-d0317e407112