diff --git a/docs/conf.py b/docs/conf.py
index d804dd549..4f7d3347c 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -43,6 +43,7 @@
     "toolz.curried",
     "toolz.functoolz",
     "tqdm",
+    "yaml",
 ]
 
 for mod_name in MOCK_MODULES: