diff --git a/TermTk/TTkCore/canvas.py b/TermTk/TTkCore/canvas.py
index 1b41a1d3..f49e07ea 100644
--- a/TermTk/TTkCore/canvas.py
+++ b/TermTk/TTkCore/canvas.py
@@ -28,9 +28,8 @@ import TermTk.libbpytop as lbt
 from TermTk.TTkCore.constant import TTkK
 from TermTk.TTkCore.log import TTkLog
 from TermTk.TTkCore.cfg import TTkCfg, TTkGlbl
-from TermTk.TTkCore.color import *
-from TermTk.TTkCore.helper import *
-from TermTk.TTkGui.theme import *
+from TermTk.TTkCore.color import TTkColor
+from TermTk.TTkCore.helper import TTkHelper
 
 class TTkCanvas:
     '''
diff --git a/TermTk/TTkCore/helper.py b/TermTk/TTkCore/helper.py
index f8d20c9b..4e55625f 100644
--- a/TermTk/TTkCore/helper.py
+++ b/TermTk/TTkCore/helper.py
@@ -126,7 +126,6 @@ class TTkHelper:
         '''
         if TTkHelper._rootCanvas is None:
             return
-        TTkHelper._rootCanvas.updateSize()
 
         # Build a list of buffers to be repainted
         updateBuffers = TTkHelper._updateBuffer.copy()