diff --git a/ArchiSteamFarm/ArchiWebHandler.cs b/ArchiSteamFarm/ArchiWebHandler.cs
index 74bd458cc..969d0ef06 100644
--- a/ArchiSteamFarm/ArchiWebHandler.cs
+++ b/ArchiSteamFarm/ArchiWebHandler.cs
@@ -426,7 +426,7 @@ namespace ArchiSteamFarm {
 			List<SteamTradeOfferRequest> trades = new List<SteamTradeOfferRequest>();
 
 			SteamTradeOfferRequest singleTrade = null;
-			for (ushort i = 0; i < inventory.Count; i++) {
+			for (ushort i = 0; i < inventory.Count && i < Trading.MaxTradesPerAccount; i++) {
 				if (i % Trading.MaxItemsPerTrade == 0) {
 					singleTrade = new SteamTradeOfferRequest();
 					trades.Add(singleTrade);
diff --git a/ArchiSteamFarm/Trading.cs b/ArchiSteamFarm/Trading.cs
index 0cb984753..f379f908a 100644
--- a/ArchiSteamFarm/Trading.cs
+++ b/ArchiSteamFarm/Trading.cs
@@ -28,7 +28,8 @@ using System.Threading.Tasks;
 
 namespace ArchiSteamFarm {
 	internal sealed class Trading {
-		internal const ushort MaxItemsPerTrade = 150;
+		internal const byte MaxItemsPerTrade = 150; // This is due to limit on POST size in WebBrowser
+		internal const byte MaxTradesPerAccount = 5; // This is limit introduced by Valve
 
 		private readonly Bot Bot;
 		private readonly SemaphoreSlim Semaphore = new SemaphoreSlim(1);