diff --git a/readme.md b/readme.md
index 653655c..b74ee38 100644
--- a/readme.md
+++ b/readme.md
@@ -276,6 +276,17 @@ GET http://api_host:port/api/v1/status
 
 ## Change Log
 
+#### v39.3(2021-09-18)
+
+- `feature`: `ethash` new low power LHR mode, add `-lhr-mode` option.
+  - `-lhr-mode 2` is the default LHR mode, which is the new lower power mode.
+  - `-lhr-mode 1` changes LHR mode to old version, which is the same as `v39.2`
+  - `-lhr-mode 1` is suitable for only power limit bounded GPU, can achieve higher hashrate than mode 2
+  - `-lhr-mode 2` is able to achieve lower average power and temperature. espacially suitable for GPUs with gddr6x e.g.3070ti, 3080, 3080ti. Power consumtion is fluctuating in this mode, better be used with locked core clock.
+- `feature`: `-lhr` support decimal value
+- `feature`: for LHR GPUs, when mining lock is detected, miner will automatically decrease `-lhr` value by 0.1, and continue mining. max decrease times is 10, which sums to 1.0
+- `fix`: higher CPU usage when set `--share-check 0`
+
 #### v39.2(2021-09-01)
 
 - `feature`: `ethash` added LHR lock detection and recovery in LHR mode.
diff --git a/readme_zh.md b/readme_zh.md
index 5bcc871..9db3628 100644
--- a/readme_zh.md
+++ b/readme_zh.md
@@ -262,6 +262,16 @@ GET http://api_host:port/api/v1/status
 
 ## 修改记录
 
+#### v39.3(2021-09-18)
+
+- `功能`: `ethash` 新增低功耗LHR模式，通过`-lhr-mode`选择
+  - `-lhr-mode`默认值为2，即低功耗模式，可通过手动修改为1，启用`v39.2`中的LHR模式
+  - `-lhr-mode 1`适用于追求更高算力，锁功耗不锁核心频率的显卡
+  - `-lhr-mode 2`适用于追求更低的平均功耗和温度，尤其3070ti、3080、3080ti等显存温度较高的gddr6x显卡。该模式下功耗呈周期性波动，建议锁定核心频率使用该模式
+- `功能`: `-lhr`支持传入小数
+- `功能`: LHR模式下，当挖矿过程中检测到锁后，程序自动将`-lhr`值降低0.1继续挖矿，最多降低10次总共 1.0
+- `修复`: 设置`--share-check 0`后CPU占用率高的问题
+
 #### v39.2(2021-09-01)
 
 - `功能`: `ethash` 新增LHR模式下对算力锁的检测与恢复，防止中途遇锁后算力持续低下的情况