diff --git a/README.md b/README.md
index 512289fd..bf2524fe 100644
--- a/README.md
+++ b/README.md
@@ -247,8 +247,8 @@ pdf2zh example.pdf -li en -lo ja
   See [Tencent Machine Translation](https://www.tencentcloud.com/products/tmt?from_qcintl=122110104)
 
   Following ENVs are required:
-  - `Tencent_SECRET_ID`, e.g., `export Tencent_SECRET_ID=AKIDxxx`
-  - `Tencent_SECRET_KEY`, e.g, `export Tencent_SECRET_KEY=xxx`
+  - `TENCENT_SECRET_ID`, e.g., `export TENCENT_SECRET_ID=AKIDxxx`
+  - `TENCENT_SECRET_KEY`, e.g, `export TENCENT_SECRET_KEY=xxx`
 
   ```bash
   pdf2zh example.pdf -s tmt
diff --git a/README_zh-CN.md b/README_zh-CN.md
index 76a7356f..372fc4d1 100644
--- a/README_zh-CN.md
+++ b/README_zh-CN.md
@@ -254,8 +254,8 @@ pdf2zh example.pdf -s azure
 
 需设置以下环境变量：
 
-- `Tencent_SECRET_ID`, e.g., `export Tencent_SECRET_ID=AKIDxxx`
-- `Tencent_SECRET_KEY`, e.g., `export Tencent_SECRET_KEY=xxx`
+- `TENCENT_SECRET_ID`, e.g., `export TENCENT_SECRET_ID=AKIDxxx`
+- `TENCENT_SECRET_KEY`, e.g., `export TENCENT_SECRET_KEY=xxx`
 
 ```bash
 pdf2zh example.pdf -s tmt