diff --git a/examples/mb851/mb851-websense/project-conf.h b/examples/mb851/mb851-websense/project-conf.h
index 44a7d6795..a151f6be8 100644
--- a/examples/mb851/mb851-websense/project-conf.h
+++ b/examples/mb851/mb851-websense/project-conf.h
@@ -36,7 +36,7 @@
 #define QUEUEBUF_CONF_NUM          2
 
 #undef UIP_CONF_BUFFER_SIZE
-#define UIP_CONF_BUFFER_SIZE    140
+#define UIP_CONF_BUFFER_SIZE    128
 
 #undef UIP_CONF_RECEIVE_WINDOW
 #define UIP_CONF_RECEIVE_WINDOW  60
@@ -44,4 +44,7 @@
 #undef WEBSERVER_CONF_CFS_CONNS
 #define WEBSERVER_CONF_CFS_CONNS 2
 
+#undef WITH_SERIAL_LINE_INPUT
+#define WITH_SERIAL_LINE_INPUT 0
+
 #endif /* __PROJECT_RPL_WEB_CONF_H__ */