diff --git a/ArchiSteamFarm/BotConfig.cs b/ArchiSteamFarm/BotConfig.cs
index add7a452f..30d47e375 100644
--- a/ArchiSteamFarm/BotConfig.cs
+++ b/ArchiSteamFarm/BotConfig.cs
@@ -62,6 +62,7 @@ namespace ArchiSteamFarm {
 		private const string DefaultSteamTradeToken = null;
 		private const ETradingPreferences DefaultTradingPreferences = ETradingPreferences.None;
 		private const bool DefaultUseLoginKeys = true;
+		private const byte SteamTradeTokenLength = 8;
 
 		private static readonly ImmutableList<EFarmingOrder> DefaultFarmingOrders = ImmutableList<EFarmingOrder>.Empty;
 		private static readonly ImmutableHashSet<uint> DefaultGamesPlayedWhileIdle = ImmutableHashSet<uint>.Empty;
@@ -288,6 +289,10 @@ namespace ArchiSteamFarm {
 				return (false, string.Format(Strings.ErrorConfigPropertyInvalid, nameof(SteamParentalCode), SteamParentalCode));
 			}
 
+			if (!string.IsNullOrEmpty(SteamTradeToken) && (SteamTradeToken.Length != SteamTradeTokenLength)) {
+				return (false, string.Format(Strings.ErrorConfigPropertyInvalid, nameof(SteamTradeToken), SteamTradeToken));
+			}
+
 			foreach ((ulong steamID, EPermission permission) in SteamUserPermissions) {
 				if ((steamID == 0) || !new SteamID(steamID).IsIndividualAccount) {
 					return (false, string.Format(Strings.ErrorConfigPropertyInvalid, nameof(SteamUserPermissions), steamID));