diff --git a/docs/source/conf.py b/docs/source/conf.py
index a57b9b485..907a8abe0 100644
--- a/docs/source/conf.py
+++ b/docs/source/conf.py
@@ -37,7 +37,7 @@
 napoleon_use_param = False
 napoleon_use_ivar = True
 
-autodoc_mock_imports = ["traci"]
+autodoc_mock_imports = ["traci", "sumolib"]
 
 # Add any paths that contain templates here, relative to this directory.
 templates_path = ['_templates']