diff --git a/models/site.rb b/models/site.rb
index 5b87e43a..11e3e0f2 100644
--- a/models/site.rb
+++ b/models/site.rb
@@ -243,6 +243,8 @@ class Site < Sequel::Model
       raise 'username is missing'
     end
 
+    return if is_banned == true
+
     DB.transaction {
       self.is_banned = true
       self.updated_at = Time.now