diff --git a/EpcQrCode/src/commonMain/kotlin/net/codinux/banking/epcqrcode/EpcQrCodeConfig.kt b/EpcQrCode/src/commonMain/kotlin/net/codinux/banking/epcqrcode/EpcQrCodeConfig.kt
index 984a153..f843e57 100644
--- a/EpcQrCode/src/commonMain/kotlin/net/codinux/banking/epcqrcode/EpcQrCodeConfig.kt
+++ b/EpcQrCode/src/commonMain/kotlin/net/codinux/banking/epcqrcode/EpcQrCodeConfig.kt
@@ -7,13 +7,13 @@ open class EpcQrCodeConfig(
      * Name of the Receiver. Mandatory.
      * Max. 70 characters
      */
-    open val receiverName: String = "",
+    open val receiverName: String,
 
     /**
      * Receiver's IBAN. Mandatory.
      * Max. 34 bytes.
      */
-    open val iban: String = "",
+    open val iban: String,
 
     open val bic: String? = null,