diff --git a/notes.md b/notes.md
index cc10bb6..127d2b7 100644
--- a/notes.md
+++ b/notes.md
@@ -4,4 +4,5 @@ conda config --add channels https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/m
 conda config --set show_channel_urls yes<br>
 pip install -i https://pypi.tuna.tsinghua.edu.cn/simple pip -U<br>
 pip config set global.index-url https://pypi.tuna.tsinghua.edu.cn/simple<br>
+pip config set global.index-url https://pypi.douban.com/simple/
 conda env create -f env_info_file.yml<br>