diff --git a/How-to-upgrade-4G-extension-firmware.md b/How-to-upgrade-4G-extension-firmware.md
index f2fa464..e5db828 100644
--- a/How-to-upgrade-4G-extension-firmware.md
+++ b/How-to-upgrade-4G-extension-firmware.md
@@ -1,8 +1,9 @@
 # Precautions
-The following-mentioned flashing operation requires your familiarity with Linux and firmware flashing. 
-**Please do not attempt it without sufficient experience!**
-**Please do not attempt it without sufficient experience!**
-**Please do not attempt it without sufficient experience!**
+The following-mentioned flashing operation requires your familiarity with Linux and firmware flashing.   
+**Please do not attempt it without sufficient experience!**  
+**Please do not attempt it without sufficient experience!**  
+**Please do not attempt it without sufficient experience!**  
+
 as we will not be held responsible for any consequences. Thank you for your understanding.
 
 once you flashed the new firmware, there is no going back