diff --git a/models/contract.go b/models/contract.go
index 22c82db..fbb2445 100644
--- a/models/contract.go
+++ b/models/contract.go
@@ -25,7 +25,6 @@ type ContractTemplateOptions struct {
 	Disclaimer           string   `json:"disclaimer"`
 	ReceiptMinimumAmount int      `json:"receipt_minimum_amount"`
 	EventName            string   `json:"event_name"`
-	SponsoringHeader     string   `json:"base_url"`
 	BarcodeFormat        string   `json:"barcode_format"`
 	BarcodePrefix        string   `json:"barcode_prefix"`
 }