updating Select options wont display

Using the Select widget, when Bokeh server is initialized, everything is fine. For example on init, I have

myDropdown = Select(title=“my dropdown:”, options=[‘foo’,‘bar’])

The widget shows up correctly and displays the options “foo” and “bar”. I now want to add another value to the Select widget eg:

myDropdown.options = [‘foo’, ‘bar’, ‘baz’]

Despite my efforts to update the widget with “baz”, the options remain [‘foo’, ‘bar’]. How do I update a Select widget?