diff --git a/documents/install_tools.md b/documents/install_tools.md
index c4a691c..e4f5c8b 100644
--- a/documents/install_tools.md
+++ b/documents/install_tools.md
@@ -1,5 +1,5 @@
 # 安装wget、curl
-- centos
+- Centos
 ```
 yum update && yum install -y wget curl
 ```