diff --git a/src/Predictalytics.Infrastructure/Data/Repositories/TradeRepository.cs b/src/Predictalytics.Infrastructure/Data/Repositories/TradeRepository.cs
index 16d4a4f..7a2beea 100644
--- a/src/Predictalytics.Infrastructure/Data/Repositories/TradeRepository.cs
+++ b/src/Predictalytics.Infrastructure/Data/Repositories/TradeRepository.cs
@@ -84,10 +84,10 @@ public class TradeRepository : ITradeRepository
                 parameters.Add(t.Size);
                 parameters.Add(t.Amount);
                 parameters.Add(t.ExecutedAt);
-                parameters.Add(t.TransactionHash ?? (object)DBNull.Value);
+                parameters.Add(t.TransactionHash ?? (object?)null);
                 parameters.Add(t.TraderId);
-                parameters.Add(t.MarketOutcomeId ?? (object)DBNull.Value);
-                parameters.Add(t.DbMarketId ?? (object)DBNull.Value);
+                parameters.Add(t.MarketOutcomeId ?? (object?)null);
+                parameters.Add(t.DbMarketId ?? (object?)null);
                 parameters.Add((int)t.Platform);
                 parameters.Add(t.IsContextEnriched);
             }