diff --git a/webrtc/DtlsTransport.hpp b/webrtc/DtlsTransport.hpp
index f1b10ca7..b3fa244e 100644
--- a/webrtc/DtlsTransport.hpp
+++ b/webrtc/DtlsTransport.hpp
@@ -227,7 +227,8 @@ namespace RTC
 		bool handshakeDone{ false };
 		bool handshakeDoneNow{ false };
 		std::string remoteCert;
-		static constexpr int SslReadBufferSize{ 65536 };
+		//最大不超过mtu
+		static constexpr int SslReadBufferSize{ 1600 };
         uint8_t sslReadBuffer[SslReadBufferSize];
 };
 } // namespace RTC
diff --git a/webrtc/IceServer.cpp b/webrtc/IceServer.cpp
index 38963c58..d80ef0f0 100644
--- a/webrtc/IceServer.cpp
+++ b/webrtc/IceServer.cpp
@@ -7,10 +7,6 @@
 namespace RTC
 {
 	/* Static. */
-
-	static constexpr size_t StunSerializeBufferSize{ 65536 };
-	static uint8_t StunSerializeBuffer[StunSerializeBufferSize];
-
 	/* Instance methods. */
 
 	IceServer::IceServer(Listener* listener, const std::string& usernameFragment, const std::string& password)
diff --git a/webrtc/IceServer.hpp b/webrtc/IceServer.hpp
index ad5d93eb..103727f0 100644
--- a/webrtc/IceServer.hpp
+++ b/webrtc/IceServer.hpp
@@ -106,6 +106,9 @@ namespace RTC
 		IceState state{ IceState::NEW };
 		std::list<RTC::TransportTuple> tuples;
 		RTC::TransportTuple* selectedTuple{ nullptr };
+		//最大不超过mtu
+        static constexpr size_t StunSerializeBufferSize{ 1600 };
+        uint8_t StunSerializeBuffer[StunSerializeBufferSize];
 	};
 } // namespace RTC