diff --git a/Binance.Net/Objects/Models/Spot/SimpleEarn/BinanceSimpleEarnLockedPosition.cs b/Binance.Net/Objects/Models/Spot/SimpleEarn/BinanceSimpleEarnLockedPosition.cs
index 1b1c1502..859e64bf 100644
--- a/Binance.Net/Objects/Models/Spot/SimpleEarn/BinanceSimpleEarnLockedPosition.cs
+++ b/Binance.Net/Objects/Models/Spot/SimpleEarn/BinanceSimpleEarnLockedPosition.cs
@@ -13,7 +13,7 @@ public record BinanceSimpleEarnLockedPosition
         /// <summary>
         /// Position id
         /// </summary>
-        [JsonPropertyName("positionId")]
+        [JsonPropertyName("positionId"), JsonConverter(typeof(NumberStringConverter))]
         public string PositionId { get; set; } = string.Empty;
         /// <summary>
         /// Project id