diff --git a/doc/source/conf.py b/doc/source/conf.py
index cd342ca04..b129ec46c 100644
--- a/doc/source/conf.py
+++ b/doc/source/conf.py
@@ -22,7 +22,7 @@
 source_suffix = ".rst"
 
 # The root toctree document.
-root_doc = "index"
+master_doc = "index"
 
 # General information about the project.
 project = "Bandit"