diff --git a/bypy/macos.conf b/bypy/macos.conf
index 766be13411..7f278e1bb4 100644
--- a/bypy/macos.conf
+++ b/bypy/macos.conf
@@ -1,5 +1,5 @@
 # Requires installation of XCode 10.3 and Python 3 and
-# python3 -m pip install certifi
+# python3 -m pip install certifi html5lib
 
 vm_name 'macos-calibre-qt6'
 root '/Users/Shared/calibre-build'