diff --git a/hardware/esp8266com/esp8266/libraries/ESP8266WiFi/src/WiFiUdp.cpp b/hardware/esp8266com/esp8266/libraries/ESP8266WiFi/src/WiFiUdp.cpp
index ee3bcb6e3..7696d747b 100644
--- a/hardware/esp8266com/esp8266/libraries/ESP8266WiFi/src/WiFiUdp.cpp
+++ b/hardware/esp8266com/esp8266/libraries/ESP8266WiFi/src/WiFiUdp.cpp
@@ -169,7 +169,6 @@ int WiFiUDP::endPacket()
         return 0;
 
     _ctx->send();
-    _ctx->disconnect();
     return 1;
 }
 
diff --git a/hardware/esp8266com/esp8266/libraries/ESP8266WiFi/src/include/UdpContext.h b/hardware/esp8266com/esp8266/libraries/ESP8266WiFi/src/include/UdpContext.h
index 743f76789..c86e050ed 100644
--- a/hardware/esp8266com/esp8266/libraries/ESP8266WiFi/src/include/UdpContext.h
+++ b/hardware/esp8266com/esp8266/libraries/ESP8266WiFi/src/include/UdpContext.h
@@ -304,7 +304,7 @@ private:
 
     void _reserve(size_t size)
     {
-        const size_t pbuf_unit_size = 1024;
+        const size_t pbuf_unit_size = 512;
         if (!_tx_buf_head)
         {
             _tx_buf_head = pbuf_alloc(PBUF_TRANSPORT, pbuf_unit_size, PBUF_RAM);