diff --git a/README.md b/README.md
index 354ab69..8400ce9 100644
--- a/README.md
+++ b/README.md
@@ -5,4 +5,4 @@
 git clone --depth 1 http://112.124.49.128:3000/tzquant_zq/tz_crypto_pub && cd tz_crypto_pub && sh init_bash.sh && python3 tz_crypto_bt.py
 
 初次已经安装好环境更新框架：
-rm -rf tz_crypto_pub && git clone http://112.124.49.128:3000/tzquant_zq/tz_crypto_pub && cd tz_crypto_pub && python3 tz_crypto_bt.py
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+rm -rf tz_crypto_pub && git clone --depth 1 http://112.124.49.128:3000/tzquant_zq/tz_crypto_pub && cd tz_crypto_pub && python3 tz_crypto_bt.py
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