diff --git a/server/lib/orcasite/accounts/user.ex b/server/lib/orcasite/accounts/user.ex
index 727a2de8..dd14f030 100644
--- a/server/lib/orcasite/accounts/user.ex
+++ b/server/lib/orcasite/accounts/user.ex
@@ -25,7 +25,7 @@ defmodule Orcasite.Accounts.User do
 
     attribute :username, :string do
       allow_nil? false
-      constraints allow_empty?: false
+      constraints allow_empty?: false, trim?: true
     end
 
     create_timestamp :inserted_at