title: How to Update the Installed Widgets
body: <p>When I started Jupyter Lab from the cmd prompt within a python virtual environment folder, I noticed the Jupyter startup process display that 
  three of the Jupyter widgets are outdated.   There was no display message describing how to update these widgets.</p>
  
  <p>Therefore, the question is:  How to update the Jupyter widgets?</p>
  
  <p>I searched for a solution and did not find any.</p>
  
  <p>The Startup code w/ three widget outdated messages at bottom</p>
  
  <pre><code>(ML3-2Gxa7Dh2) C:\pythonVE\ML3&gt;jupyter lab
  
  [I 11:26:05.773 LabApp] JupyterLab extension loaded from c:\python37\lib\site-packages\jupyterlab
  [I 11:26:05.773 LabApp] JupyterLab application directory is c:\python37\share\jupyter\lab
  [W 11:26:05.793 LabApp] Error loading server extension jupyterlab_latex
      Traceback (most recent call last):
        File "c:\python37\lib\site-packages\notebook\notebookapp.py", line 1572, in init_server_extensions
          mod = importlib.import_module(modulename)
        File "c:\python37\lib\importlib\__init__.py", line 127, in import_module
          return _bootstrap._gcd_import(name[level:], package, level)
        File "&lt;frozen importlib._bootstrap&gt;", line 1006, in _gcd_import
        File "&lt;frozen importlib._bootstrap&gt;", line 983, in _find_and_load
        File "&lt;frozen importlib._bootstrap&gt;", line 965, in _find_and_load_unlocked
      ModuleNotFoundError: No module named 'jupyterlab_latex'
  [W 11:26:05.840 LabApp] JupyterLab server extension not enabled, manually loading...
  [I 11:26:05.881 LabApp] JupyterLab extension loaded from c:\python37\lib\site-packages\jupyterlab
  [I 11:26:05.881 LabApp] JupyterLab application directory is c:\python37\share\jupyter\lab
  [I 11:26:05.883 LabApp] Serving notebooks from local directory: C:\pythonVE\ML3
  [I 11:26:05.883 LabApp] The Jupyter Notebook is running at:
  [I 11:26:05.883 LabApp] http://localhost:8888/
  [I 11:26:05.884 LabApp] Use Control-C to stop this server and shut down all kernels (twice to skip confirmation).
  [I 11:26:07.540 LabApp] 302 GET /lab (::1) 1.00ms
  [I 11:26:16.232 LabApp] 302 POST /login?next=%2Flab (::1) 1.00ms
  [W 11:26:47.607 LabApp] The extension "@jupyter-widgets/jupyterlab-manager" is outdated.
  
  [W 11:26:47.609 LabApp] The extension "@jupyterlab/latex" is outdated.
  
  [W 11:26:47.611 LabApp] The extension "@jupyterlab/toc" is outdated.
  
  [I 11:26:48.411 LabApp] Build is up to date
  |[I 11:26:54.426 LabApp] Kernel started: 5ba63189-6fa9-40cc-87ea-eea2d869
  </code></pre>
  
  <p>Widgets seem to work within the Jlab notebook.</p>