diff --git a/src/linker.tun/LinkerTunDeviceAdapter.cs b/src/linker.tun/LinkerTunDeviceAdapter.cs
index 090dcb4a..b32632fa 100644
--- a/src/linker.tun/LinkerTunDeviceAdapter.cs
+++ b/src/linker.tun/LinkerTunDeviceAdapter.cs
@@ -279,9 +279,9 @@ namespace linker.tun
             return false;
         }
 
-        private void OutputPacket(string tag,ReadOnlyMemory<byte> buffer)
+        private void OutputPacket(string tag, ReadOnlyMemory<byte> buffer)
         {
-            
+
             byte version = (byte)(buffer.Span[0] >> 4 & 0b1111);
 
             if (version == 4)
@@ -362,7 +362,7 @@ namespace linker.tun
                 {
                     uint realDist = BinaryPrimitives.ReverseEndianness(realNetwork | (fakeDist & ~masks[i]));
                     ReWriteIP(buffer, realDist, 16);
-                    natDic.TryAdd(realDist, fakeDist);
+                    natDic.AddOrUpdate(realDist, fakeDist, (a, b) => fakeDist);
                     break;
                 }
             }
diff --git a/version.txt b/version.txt
index 47e8d9c4..6cabbbb4 100644
--- a/version.txt
+++ b/version.txt
@@ -1,5 +1,5 @@
 v1.7.3
-2025-04-14 16:46:15
+2025-04-14 16:48:52
 1. 优化自动分配IP
 2. 优化网卡，排除不明数据包
 3. 虚拟网卡点对网IP映射，用于解决网段冲突
\ No newline at end of file