diff --git a/README.md b/README.md
index 1b2af5c..4f592b8 100644
--- a/README.md
+++ b/README.md
@@ -10,5 +10,5 @@ disconnect pin 9
 disconnect pin 23
 
 after run 
-esptool --chip esp32 --port /dev/ttyACM0 read_flash 0x000000 0x400000 esp32_dump.bin 
+`esptool --chip esp32 --port /dev/ttyACM0 read_flash 0x000000 0x400000 esp32_dump.bin `