diff --git a/README.md b/README.md
index 9fc0057..67f930b 100644
--- a/README.md
+++ b/README.md
@@ -2,9 +2,7 @@
 
 ![Python 3.9+](https://img.shields.io/badge/python-3.9+-blue.svg)
 ![](https://img.shields.io/badge/license-Apache-000000.svg)
-![PRs Welcome](https://img.shields.io/badge/PRs-Welcome-green) 
 ![GitHub last commit](https://img.shields.io/github/last-commit/ant-research/EasyTemporalPointProcess)
-
 ![Stars](https://img.shields.io/github/stars/ant-research/EasyTemporalPointProcess)
 [![PyPI version](https://img.shields.io/pypi/v/easy-tpp.svg?style=flat-square&color=b7534)](https://pypi.python.org/pypi/easy-tpp/)
 [![Downloads](https://static.pepy.tech/personalized-badge/easy-tpp?period=total&units=international_system&left_color=black&right_color=blue&left_text=Downloads)](https://pepy.tech/project/easy-tpp)
diff --git a/docs/source/dev_guide/model_custom.rst b/docs/source/dev_guide/model_custom.rst
index b3d87f0..0f81445 100644
--- a/docs/source/dev_guide/model_custom.rst
+++ b/docs/source/dev_guide/model_custom.rst
@@ -3,7 +3,7 @@ Customize a Model
 ==================
 
 
-Here we introduce how to customize a new TPP model with the support of ``EasyTPP``.
+Here we introduce how to customize a TPP model with the support of ``EasyTPP``.