diff --git a/README.md b/README.md
index 4c175b3..97217f5 100644
--- a/README.md
+++ b/README.md
@@ -7,7 +7,10 @@ This app uses Go's `embed` package to bundle all static files (web UI, icons, CS
 ### Prerequisites
 - [Go 1.16+](https://golang.org/dl/) (required for `embed`)
 - (Optional) [Python 3](https://www.python.org/) with Pillow for icon conversion
-
+```go
+go mod init headeranalyzer
+go mod tidy
+```
 ### 1. Prepare Icons
 - Place your tray icon and favicon in `web/icon.png` and `web/favicon.png`.
 - For Windows tray icon, you **must** use a `.ico` file. Use the provided script:
diff --git a/main.go b/main.go
index 377f2fc..3445b03 100644
--- a/main.go
+++ b/main.go
@@ -40,7 +40,7 @@ func onReady(addrPort string, shutdownCh chan struct{}) {
 	if runtime.GOOS == "windows" {
 		iconPath = "web/favicon.ico"
 	} else {
-		iconPath = "web/favicon.png"
+		iconPath = "web/favicon.ico"
 	}
 
 	iconData, err := fs.ReadFile(embeddedFiles, iconPath)
diff --git a/web/icon.png b/web/icon.png
deleted file mode 100644
index cfe7a78..0000000
Binary files a/web/icon.png and /dev/null differ