diff --git a/config.ru b/config.ru
index 7255143c92d872aa747ef3b005cea3bdb5187e93..ac9fde5dd74851a99f99144d4a97035aa90cc958 100644
--- a/config.ru
+++ b/config.ru
@@ -215,11 +215,11 @@ class JmpPay < Roda
 		return if REDIS.sismember(redis_key_btc_addresses, request.params["address"])
 
 		warn "Address and customer_id do not match"
-		r.halt(
+		r.halt([
 			403,
 			{"Content-Type" => "text/plain"},
 			"Address and customer_id do not match"
-		)
+		])
 	end
 
 	route do |r|