diff --git a/internal/handlers/handlers.go b/internal/handlers/handlers.go
index cf4b41b..b732ed8 100644
--- a/internal/handlers/handlers.go
+++ b/internal/handlers/handlers.go
@@ -23,6 +23,10 @@ var defaultAmberOptions = amber.Options{PrettyPrint: false, LineNumbers: false}
 
 var compiledTemplates map[string]*template.Template
 
+type NotFoundData struct {
+	MainSite string
+}
+
 type IndexData struct {
 	MainSite         string
 	FileMaxSz        string
@@ -176,7 +180,6 @@ func (h *UploadHandlers) Download(w http.ResponseWriter, r *http.Request) {
 	}
 
 	w.Header().Add("Content-Disposition", fmt.Sprintf("attachment; filename=\"%s\"", name))
-	// w.Header().Add("Content-Type", "application/octet-stream")
 
 	fd, err := os.Open(path)
 	if err != nil {
@@ -190,3 +193,13 @@ func (h *UploadHandlers) Download(w http.ResponseWriter, r *http.Request) {
 
 	http.ServeContent(w, r, path, stat.ModTime(), fd)
 }
+
+func (h *UploadHandlers) NotFound(w http.ResponseWriter, r *http.Request) {
+	w.WriteHeader(http.StatusNotFound)
+	if err := compiledTemplates["404"].Execute(w, NotFoundData{
+		MainSite: utils.MainSite(r.Host),
+	}); err != nil {
+		w.WriteHeader(http.StatusInternalServerError)
+		h.logErr.Fatalln("failed to execute 404 template:", err)
+	}
+}