diff --git a/README.md b/README.md
index 4b4ce15..7ce453b 100644
--- a/README.md
+++ b/README.md
@@ -941,6 +941,8 @@ ALB
 
 ### ALB Gotchas and Limitations
 
+-	🔸ALBs only support HTTP/2 over HTTPS (no plain-text HTTP/2).
+-	🔸ALBs only support HTTP/2 to external clients and not to internal resources (Instance/Container).
 -	ALBs support HTTP routing but not port-based TCP routing.
 -	ALBs do not (yet) support routing based on HTTP “Host” header or HTTP verb.
 -	Instances in the ALB's target groups have to either have a single, fixed healthcheck port (“EC2 instance”-level healthcheck) or the healthcheck port for a target has to be the same as its application port (“Application instance”-level healthcheck) - you can't configure a per-target healthcheck port that is different than the application port.