diff --git a/core/src/main/java/haveno/core/payment/PaymentAccount.java b/core/src/main/java/haveno/core/payment/PaymentAccount.java
index b692b51faf..9ff8e70d2d 100644
--- a/core/src/main/java/haveno/core/payment/PaymentAccount.java
+++ b/core/src/main/java/haveno/core/payment/PaymentAccount.java
@@ -340,9 +340,9 @@ public void revertChanges() {
     // ---------------------------- SERIALIZATION -----------------------------
 
     public String toJson() {
-        Gson gson = gsonBuilder
-            .registerTypeAdapter(PaymentAccount.class, new PaymentAccountTypeAdapter(this.getClass()))
-            .create();
+        Gson gson = new GsonBuilder()
+        .registerTypeHierarchyAdapter(PaymentAccount.class, new PaymentAccountTypeAdapter(this.getClass()))
+        .create();
         return gson.toJson(this);
     }