diff --git a/http-watcher.go b/http-watcher.go
index b44ee5a..0f44bcb 100644
--- a/http-watcher.go
+++ b/http-watcher.go
@@ -234,12 +234,14 @@ func fileHandler(w http.ResponseWriter, path string, req *http.Request) {
 			}
 			w.Header().Set("Content-Type", ctype)
 		}
-		if fi, err := os.Stat(path); err == nil {
-			w.Header().Set("Content-Length", fmt.Sprintf("%d", fi.Size()))
+		// text/html has larger size after appendReloadHook
+		if strings.HasPrefix(ctype, "text/html") {
+			w.WriteHeader(200)
+			io.Copy(w, f)
+			appendReloadHook(w, ctype, req)
+			return
 		}
-		w.WriteHeader(200)
-		io.Copy(w, f)
-		appendReloadHook(w, ctype, req)
+		http.ServeFile(w, req, path)
 	}
 }