diff --git a/ArchiSteamFarm/SteamItem.cs b/ArchiSteamFarm/SteamItem.cs
index 50703e70b1681..3f6fcfbd9a39c 100644
--- a/ArchiSteamFarm/SteamItem.cs
+++ b/ArchiSteamFarm/SteamItem.cs
@@ -28,25 +28,25 @@ namespace ArchiSteamFarm {
 	internal sealed class SteamItem {
 		// REF: https://developer.valvesoftware.com/wiki/Steam_Web_API/IEconService#CEcon_Asset
 
-		[JsonProperty(Required = Required.Always)]
+		[JsonProperty(Required = Required.DisallowNull)]
 		internal string appid { get; set; }
 
-		[JsonProperty(Required = Required.Always)]
+		[JsonProperty(Required = Required.DisallowNull)]
 		internal string contextid { get; set; }
 
-		[JsonProperty(Required = Required.Always)]
+		[JsonProperty(Required = Required.DisallowNull)]
 		internal string assetid { get; set; }
 
-		[JsonProperty]
+		[JsonProperty(Required = Required.DisallowNull)]
 		internal string id {
 			get { return assetid; }
 			set { assetid = value; }
 		}
 
-		[JsonProperty(Required = Required.Always)]
+		[JsonProperty(Required = Required.AllowNull)]
 		internal string classid { get; set; }
 
-		[JsonProperty(Required = Required.Always)]
+		[JsonProperty(Required = Required.AllowNull)]
 		internal string instanceid { get; set; }
 
 		[JsonProperty(Required = Required.Always)]