diff --git a/ArchiSteamFarm/CardsFarmer.cs b/ArchiSteamFarm/CardsFarmer.cs
index c10af0281..63a955c24 100755
--- a/ArchiSteamFarm/CardsFarmer.cs
+++ b/ArchiSteamFarm/CardsFarmer.cs
@@ -24,6 +24,7 @@
 
 using HtmlAgilityPack;
 using System;
+using System.Collections.Concurrent;
 using System.Collections.Generic;
 using System.Globalization;
 using System.Text.RegularExpressions;
@@ -41,7 +42,7 @@ namespace ArchiSteamFarm {
 		private readonly Bot Bot;
 		private readonly Timer Timer;
 
-		internal readonly Dictionary<uint, double> GamesToFarm = new Dictionary<uint, double>();
+		internal readonly ConcurrentDictionary<uint, double> GamesToFarm = new ConcurrentDictionary<uint, double>();
 		internal readonly List<uint> CurrentGamesFarming = new List<uint>();
 
 		private bool NowFarming = false;
@@ -57,7 +58,7 @@ namespace ArchiSteamFarm {
 			);
 		}
 
-		internal static List<uint> GetGamesToFarmSolo(Dictionary<uint, double> gamesToFarm) {
+		internal static List<uint> GetGamesToFarmSolo(ConcurrentDictionary<uint, double> gamesToFarm) {
 			if (gamesToFarm == null) {
 				return null;
 			}
@@ -72,7 +73,7 @@ namespace ArchiSteamFarm {
 			return result;
 		}
 
-		internal static uint GetAnyGameToFarm(Dictionary<uint, double> gamesToFarm) {
+		internal static uint GetAnyGameToFarm(ConcurrentDictionary<uint, double> gamesToFarm) {
 			if (gamesToFarm == null) {
 				return 0;
 			}
@@ -84,7 +85,7 @@ namespace ArchiSteamFarm {
 			return 0;
 		}
 
-		internal bool FarmMultiple(Dictionary<uint, double> appIDs) {
+		internal bool FarmMultiple(ConcurrentDictionary<uint, double> appIDs) {
 			if (appIDs.Count == 0) {
 				return true;
 			}
@@ -122,7 +123,8 @@ namespace ArchiSteamFarm {
 
 			Logging.LogGenericInfo(Bot.BotName, "Now farming: " + appID);
 			if (await Farm(appID).ConfigureAwait(false)) {
-				GamesToFarm.Remove(appID);
+				double hours;
+				GamesToFarm.TryRemove(appID, out hours);
 				return true;
 			} else {
 				CurrentGamesFarming.Clear();
diff --git a/ArchiSteamFarm/Properties/AssemblyInfo.cs b/ArchiSteamFarm/Properties/AssemblyInfo.cs
index 5493a7e82..f1b137e63 100644
--- a/ArchiSteamFarm/Properties/AssemblyInfo.cs
+++ b/ArchiSteamFarm/Properties/AssemblyInfo.cs
@@ -32,5 +32,5 @@ using System.Runtime.InteropServices;
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("1.2.3.0")]
-[assembly: AssemblyFileVersion("1.2.3.0")]
+[assembly: AssemblyVersion("1.2.4.0")]
+[assembly: AssemblyFileVersion("1.2.4.0")]
diff --git a/SteamAuth/SteamAuth.csproj b/SteamAuth/SteamAuth.csproj
index 9964a0d94..b8b845257 100644
--- a/SteamAuth/SteamAuth.csproj
+++ b/SteamAuth/SteamAuth.csproj
@@ -22,10 +22,11 @@
     <WarningLevel>4</WarningLevel>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
-    <DebugType>pdbonly</DebugType>
+    <DebugType>none</DebugType>
     <Optimize>true</Optimize>
     <OutputPath>bin\Release\</OutputPath>
-    <DefineConstants>TRACE</DefineConstants>
+    <DefineConstants>
+    </DefineConstants>
     <ErrorReport>prompt</ErrorReport>
     <WarningLevel>4</WarningLevel>
   </PropertyGroup>