diff --git a/assets/img/favicon.ico b/assets/img/favicon.ico
deleted file mode 100644
index 8e33912..0000000
Binary files a/assets/img/favicon.ico and /dev/null differ
diff --git a/assets/img/favicon.png b/assets/img/favicon.png
new file mode 100644
index 0000000..31820b9
Binary files /dev/null and b/assets/img/favicon.png differ
diff --git a/assets/views/layout/default.jet.html b/assets/views/layout/default.jet.html
index e341180..1ea7dd4 100644
--- a/assets/views/layout/default.jet.html
+++ b/assets/views/layout/default.jet.html
@@ -12,7 +12,7 @@
   {{ end -}}
   <title>{{ title }}</title>
 
-  <link href="/favicon.ico" rel="icon" />
+  <link href="/img/favicon.png" rel="icon" />
   <link href="/css/style.css" rel="stylesheet" />
 
   <meta name="htmx-config" content='{"includeIndicatorStyles":false}'>
diff --git a/doc/favicon.ico b/doc/favicon.ico
deleted file mode 100644
index 8e33912..0000000
Binary files a/doc/favicon.ico and /dev/null differ
diff --git a/doc/favicon.png b/doc/favicon.png
new file mode 100644
index 0000000..31820b9
Binary files /dev/null and b/doc/favicon.png differ
diff --git a/handlers/router.go b/handlers/router.go
index c4058f6..f9aeefc 100644
--- a/handlers/router.go
+++ b/handlers/router.go
@@ -31,7 +31,6 @@ func DefineRoutes() *mux.Router {
 		http.Redirect(w, r, url.String(), http.StatusPermanentRedirect)
 	})
 
-	router.HandleFunc("/favicon.ico", serveFile("./assets/img/favicon.ico"))
 	router.HandleFunc("/robots.txt", serveFile("./assets/robots.txt"))
 	handlePrefix(router, "/img/", http.FileServer(http.Dir("./assets/img")))
 	handlePrefix(router, "/css/", http.FileServer(http.Dir("./assets/css")))
diff --git a/mkdocs.yml b/mkdocs.yml
index 209f9c6..ba17271 100644
--- a/mkdocs.yml
+++ b/mkdocs.yml
@@ -52,7 +52,7 @@ theme:
   icon:
     logo: simple/pixiv
     repo: simple/codeberg
-  favicon: favicon.ico
+  favicon: favicon.png
   features:
     # -- Navigation
     # Instant loading