diff --git a/BankingClientModel/src/commonMain/kotlin/net/codinux/banking/client/model/tan/TanMethod.kt b/BankingClientModel/src/commonMain/kotlin/net/codinux/banking/client/model/tan/TanMethod.kt
index 534730cf..d32ddd70 100644
--- a/BankingClientModel/src/commonMain/kotlin/net/codinux/banking/client/model/tan/TanMethod.kt
+++ b/BankingClientModel/src/commonMain/kotlin/net/codinux/banking/client/model/tan/TanMethod.kt
@@ -1,7 +1,9 @@
 package net.codinux.banking.client.model.tan
 
+import net.codinux.banking.client.model.config.JsonIgnore
 import net.codinux.banking.client.model.config.NoArgConstructor
 
+@Suppress("RUNTIME_ANNOTATION_NOT_SUPPORTED")
 @NoArgConstructor
 open class TanMethod(
     open val displayName: String,
@@ -11,6 +13,7 @@ open class TanMethod(
     open val allowedTanFormat: AllowedTanFormat = AllowedTanFormat.Alphanumeric
 ) {
 
+    @get:JsonIgnore
     open val isNumericTan: Boolean
         get() = allowedTanFormat == AllowedTanFormat.Numeric