diff --git a/docs/design.md b/docs/design.md
index cba75bace2e4a4767eba48e93e715d39d855d1a6..d00996797ab58f4f027b822d754a52b784925bc9 100644
--- a/docs/design.md
+++ b/docs/design.md
@@ -56,10 +56,15 @@ but the bigger problem is there's no way to insert a custom random number genera
 
 Instead switching to RustCrypto crates worked fairly easily, though perhaps a bit messier having
 to deal with `GenericArray` and `DynamicDigest` and types like that. At the time of writing `curve25519-dalek` etc
-are a bit behind on dependencies which is messy, but I assume that will sort itself out.
+are a bit behind on dependencies which is messy (the perennial problem of rust dependency traits),
+but I assume that will sort itself out.
+
+Edit: Now using Salty instaed of dalek, it's designed for microcontrollers.
 
 ## `Behaviour`
 
+(This is outdated, gave up on async `Behaviour` for the time being)
+
 At some points in packet handling some custom behaviour from the application is required. For example
 "is this hostkey valid?", "is this user's password correct?". Those need an immediate response,
 so `.await` fits well.