diff --git a/lib/exchange/changenow/changenow_exchange_provider.dart b/lib/exchange/changenow/changenow_exchange_provider.dart
index 20f529733..9910c7b9a 100644
--- a/lib/exchange/changenow/changenow_exchange_provider.dart
+++ b/lib/exchange/changenow/changenow_exchange_provider.dart
@@ -114,7 +114,7 @@ class ChangeNowExchangeProvider extends ExchangeProvider {
 
     final uri = Uri.https(apiAuthority, createTradePath);
     final response = await post(uri, headers: headers, body: json.encode(body));
-    
+
     if (response.statusCode == 400) {
       final responseJSON = json.decode(response.body) as Map<String, dynamic>;
       final error = responseJSON['error'] as String;
@@ -128,9 +128,9 @@ class ChangeNowExchangeProvider extends ExchangeProvider {
 
     final responseJSON = json.decode(response.body) as Map<String, dynamic>;
     final id = responseJSON['id'] as String;
-    final inputAddress = responseJSON['payinAddress'] as String;
-    final refundAddress = responseJSON['refundAddress'] as String;
-    final extraId = responseJSON['payinExtraId'] as String;
+    final inputAddress = responseJSON['payinAddress'] as String?;
+    final refundAddress = responseJSON['refundAddress'] as String?;
+    final extraId = responseJSON['payinExtraId'] as String?;
 
     return Trade(
         id: id,