diff --git a/README.md b/README.md
index 870b71a..cb9e69f 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
 ## Installation
 ```
-curl -sSL "https://git.openergy.ru/LUCKFOX/SIM800C/raw/branch/mqtt/cleanup_and_isntall.sh" -o t3hs_sim800_install.sh && bash t3hs_sim800_install.sh
+curl -sSL "https://git.openergy.ru/LUCKFOX/SIM800C/raw/branch/main/cleanup_and_isntall.sh" -o t3hs_sim800_install.sh && bash t3hs_sim800_install.sh
 ```