diff --git a/README.md b/README.md
index 91544b7..7131e29 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,10 @@
 # esp32_ota_example
-## simple example for using esp_ota_updater to update esp32 or esp8266 from gita or gitea
-### 
+simple example for using esp_ota_updater to update esp32 or esp8266 from gita or gitea
+## project structure
+```
+ main.py
+ boot.py
+ app/---
+    start.py
+    ...
+```
\ No newline at end of file