diff --git a/ppstructure/README.md b/ppstructure/README.md
index 8e1642cc..0d0d93ef 100644
--- a/ppstructure/README.md
+++ b/ppstructure/README.md
@@ -36,7 +36,7 @@ python3 -m pip install paddlepaddle-gpu==2.1.1 -i https://mirror.baidu.com/pypi/
 - **(2) Install Layout-Parser**
 
 ```bash
-pip3 install -U premailer paddleocr https://paddleocr.bj.bcebos.com/whl/layoutparser-0.0.0-py3-none-any.whl
+pip3 install -U https://paddleocr.bj.bcebos.com/whl/layoutparser-0.0.0-py3-none-any.whl
 ```
 
 ### 2.2 Install PaddleOCR（including PP-OCR and PP-Structure）
diff --git a/ppstructure/README_ch.md b/ppstructure/README_ch.md
index c8acac59..9ba017da 100644
--- a/ppstructure/README_ch.md
+++ b/ppstructure/README_ch.md
@@ -36,7 +36,7 @@ python3 -m pip install paddlepaddle-gpu==2.1.1 -i https://mirror.baidu.com/pypi/
 - **(2) 安装 Layout-Parser**
 
 ```bash
-pip3 install -U premailer paddleocr https://paddleocr.bj.bcebos.com/whl/layoutparser-0.0.0-py3-none-any.whl
+pip3 install -U https://paddleocr.bj.bcebos.com/whl/layoutparser-0.0.0-py3-none-any.whl
 ```
 
 ### 2.2 安装PaddleOCR（包含PP-OCR和PP-Structure）
diff --git a/requirements.txt b/requirements.txt
index d96b3a9d..decaa92b 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -7,4 +7,6 @@ tqdm
 numpy
 visualdl
 python-Levenshtein
-opencv-contrib-python==4.2.0.32
\ No newline at end of file
+opencv-contrib-python==4.2.0.32
+lxml
+premailer
\ No newline at end of file