diff --git a/docs/conf.py b/docs/conf.py
index 7ea32e1..eaff827 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -30,6 +30,7 @@
 # autodoc module docs will fail to generate with a warning.
 autodoc_mock_imports = [
     "audioio",
+    "bitmaptools",
     "displayio",
     "neopixel",
     "analogio",