diff --git a/Feature%3A-Room-State-Management.md b/Feature%3A-Room-State-Management.md
index 16f5d61..42cd214 100644
--- a/Feature%3A-Room-State-Management.md
+++ b/Feature%3A-Room-State-Management.md
@@ -21,7 +21,7 @@ Trees:
 * room id -> list of users
 * room id -> RoomInfo
 
-## Architcture Changse
+## Architcture Changes
 
 A new `RoomInfo` struct must be created, and possibly a whole new layer of the application. This layer doesn't exist yet, because we've been dealing only with strings and integers so far.