diff --git a/v2rayN/v2rayN/Handler/V2rayConfigHandler.cs b/v2rayN/v2rayN/Handler/V2rayConfigHandler.cs
index a7b950d8..8c3a81f3 100644
--- a/v2rayN/v2rayN/Handler/V2rayConfigHandler.cs
+++ b/v2rayN/v2rayN/Handler/V2rayConfigHandler.cs
@@ -354,6 +354,7 @@ namespace v2rayN.Handler
 
                     //Mux
                     outbound.mux.enabled = config.muxEnabled;
+                    outbound.mux.concurrency = config.muxEnabled ? 8 : -1;
 
                     //远程服务器底层传输配置
                     StreamSettings streamSettings = outbound.streamSettings;
@@ -384,6 +385,8 @@ namespace v2rayN.Handler
                     serversItem.level = 1;
 
                     outbound.mux.enabled = false;
+                    outbound.mux.concurrency = -1;
+                    
 
                     outbound.protocol = "shadowsocks";
                     outbound.settings.vnext = null;
@@ -418,6 +421,7 @@ namespace v2rayN.Handler
                     }
 
                     outbound.mux.enabled = false;
+                    outbound.mux.concurrency = -1;
 
                     outbound.protocol = "socks";
                     outbound.settings.vnext = null;
diff --git a/v2rayN/v2rayN/LIB/libs.zip b/v2rayN/v2rayN/LIB/libs.zip
index 82a26687..ce28e787 100644
Binary files a/v2rayN/v2rayN/LIB/libs.zip and b/v2rayN/v2rayN/LIB/libs.zip differ
diff --git a/v2rayN/v2rayN/Mode/V2rayConfig.cs b/v2rayN/v2rayN/Mode/V2rayConfig.cs
index 0d661c0f..5d4ab5df 100644
--- a/v2rayN/v2rayN/Mode/V2rayConfig.cs
+++ b/v2rayN/v2rayN/Mode/V2rayConfig.cs
@@ -281,6 +281,11 @@ namespace v2rayN.Mode
         /// 
         /// </summary>
         public bool enabled { get; set; }
+
+        /// <summary>
+        /// 
+        /// </summary>
+        public int concurrency { get; set; }
     }
 
     public class Response
diff --git a/v2rayN/v2rayN/Properties/AssemblyInfo.cs b/v2rayN/v2rayN/Properties/AssemblyInfo.cs
index abd9350d..d7a18cd3 100644
--- a/v2rayN/v2rayN/Properties/AssemblyInfo.cs
+++ b/v2rayN/v2rayN/Properties/AssemblyInfo.cs
@@ -33,4 +33,4 @@ using System.Runtime.InteropServices;
 // 方法是按如下所示使用“*”:
 //[assembly: AssemblyVersion("1.0.*")]
 //[assembly: AssemblyVersion("1.0.0")]
-[assembly: AssemblyFileVersion("3.4")]
+[assembly: AssemblyFileVersion("3.5")]