diff --git a/jupyros/ros1/ros3d.py b/jupyros/ros1/ros3d.py
index b25f87f..e201c7f 100644
--- a/jupyros/ros1/ros3d.py
+++ b/jupyros/ros1/ros3d.py
@@ -8,7 +8,7 @@
 
 import os
 
-from traitlets import *
+from traitlets.traitlets import *
 import ipywidgets as widgets
 
 from .._version import __version__
@@ -540,4 +540,4 @@ def modulify(d, suffix=''):
 
     defaults_js = js_extract()
     with open(os.path.join(filedir, "../js/lib/defaults.js"), "w") as fo:
-        fo.write(defaults_js)
\ No newline at end of file
+        fo.write(defaults_js)