diff --git a/ASFEnhance/AssemblyInfo.cs b/ASFEnhance/AssemblyInfo.cs
index 903939af..c6d608ea 100644
--- a/ASFEnhance/AssemblyInfo.cs
+++ b/ASFEnhance/AssemblyInfo.cs
@@ -1,8 +1,8 @@
 using System.Reflection;
 
 [assembly: System.CLSCompliant(false)]
-[assembly: AssemblyVersion("1.5.16.287")]
-[assembly: AssemblyFileVersion("1.5.16.287")]
+[assembly: AssemblyVersion("1.5.17.289")]
+[assembly: AssemblyFileVersion("1.5.17.289")]
 
 [assembly: AssemblyCopyright("Copyright © 2022 Chr_")]
 [assembly: AssemblyProduct("ASFEnhance")]
diff --git a/ASFEnhance/Cart/WebRequest.cs b/ASFEnhance/Cart/WebRequest.cs
index 9cd29da8..022a8a83 100644
--- a/ASFEnhance/Cart/WebRequest.cs
+++ b/ASFEnhance/Cart/WebRequest.cs
@@ -30,20 +30,24 @@ internal static class WebRequest
             return HtmlParser.ParseCertPage(response);
         }
 
+        /// <summary>
+        /// 添加到购物车
+        /// </summary>
+        /// <param name="bot"></param>
+        /// <param name="gameID"></param>
+        /// <returns></returns>
         internal static async Task<bool?> AddCert(Bot bot, SteamGameID gameID)
         {
-            switch (gameID.Type)
+            if(gameID.Type == SteamGameIDType.Sub || gameID.Type == SteamGameIDType.Bundle)
             {
-                case SteamGameIDType.Sub:
-                    return await AddCert(bot, gameID.GameID, false).ConfigureAwait(false);
-                case SteamGameIDType.Bundle:
-                    return await AddCert(bot, gameID.GameID, true).ConfigureAwait(false);
-                default:
-                    return null;
+                return await AddCert(bot, gameID.GameID, gameID.Type == SteamGameIDType.Bundle).ConfigureAwait(false);
+            }
+            else
+            {
+                return null;
             }
         }
 
-
         /// <summary>
         /// 添加到购物车
         /// </summary>
@@ -380,12 +384,18 @@ internal static async Task<bool> CartSetCountry(Bot bot, string countryCode)
 
             ObjectResponse<TransactionStatusResponse?> response2 = await bot.ArchiWebHandler.UrlGetToJsonObjectWithSession<TransactionStatusResponse>(request, referer: referer).ConfigureAwait(false);
 
-            if (response2 == null)
+            if (response == null)
             {
                 bot.ArchiLogger.LogNullError(nameof(response));
                 return null;
             }
 
+            if (response2 == null)
+            {
+                bot.ArchiLogger.LogNullError(nameof(response2));
+                return null;
+            }
+
             return response2;
         }
     }