diff --git a/vnpy/chart/widget.py b/vnpy/chart/widget.py
index aa54d7c1a714aaabcaa217d20b1215bb50915bb6..8059cc9dd6445ccdad9862cea9a77016ea325b96 100644
--- a/vnpy/chart/widget.py
+++ b/vnpy/chart/widget.py
@@ -3,9 +3,6 @@ from typing import List, Dict, Type
 
 import pyqtgraph as pg
 
-from vnpy.trader.ui import QtGui, QtWidgets, QtCore
-from vnpy.trader.object import BarData
-
 from .manager import BarManager
 from .base import (
     GREY_COLOR, WHITE_COLOR, CURSOR_COLOR, BLACK_COLOR,