diff --git a/doc/development/adding-new-exchange.md b/doc/development/adding-new-exchange.md
index 6f0ae8075..1eb45a2ba 100644
--- a/doc/development/adding-new-exchange.md
+++ b/doc/development/adding-new-exchange.md
@@ -58,7 +58,7 @@ Stream
     - [ ] Public trade message parser (optional)
     - [ ] Ticker message parser (optional)
 - [ ] ping/pong handling. (you can reuse the existing types.StandardStream)
-- [ ] heart-beat hanlding or keep-alive handling. (already included in types.StandardStream)
+- [ ] heart-beat handling or keep-alive handling. (already included in types.StandardStream)
 - [ ] handling reconnect. (already included in types.StandardStream)
 
 Database