diff --git a/doc/source/conf.py b/doc/source/conf.py
index 8b354006e..fb380967d 100644
--- a/doc/source/conf.py
+++ b/doc/source/conf.py
@@ -46,6 +46,10 @@ add_module_names = True
 # The name of the Pygments (syntax highlighting) style to use.
 pygments_style = 'sphinx'
 
+# Prefixes that are ignored for sorting the Python module index
+modindex_common_prefix = ['taskflow.']
+
+
 # -- Options for HTML output --------------------------------------------------
 
 # The theme to use for HTML and HTML Help pages.  Major themes that come with