diff --git a/0.9.2/512k-flash/nodemcu_512k.bin b/0.9.2/512k-flash/nodemcu_512k.bin
index 9151e07b..04e743f6 100644
Binary files a/0.9.2/512k-flash/nodemcu_512k.bin and b/0.9.2/512k-flash/nodemcu_512k.bin differ
diff --git a/README.md b/README.md
index 08e0a0d3..2bd0c01c 100644
--- a/README.md
+++ b/README.md
@@ -1,11 +1,11 @@
 # **NodeMcu** #
 ###A lua based firmware for wifi-soc esp8266
-version 0.9.2 build 2014-11-30
+version 0.9.2 build 2014-12-02
 # Change log
-2014-11-30<br />
-modify the max freq of pwm module to 1000.<br />
-modify the max duty cycle of pwm module to 1023.<br />
-add uart module, uart.on("data") api to receive data from uart.
+2014-12-02<br />
+fix the heap recover too slow issue, heap will recover in seconds, not minutes.<br />
+modify the return of file.open, return nil if file not exist, true if opend ok.<br />
+move startup version display before doing the init.lua.
 
 [more change log](https://github.com/nodemcu/nodemcu-firmware/wiki/nodemcu_api_en#change_log)<br />
 [更多变更日志](https://github.com/nodemcu/nodemcu-firmware/wiki/nodemcu_api_cn#change_log)