diff --git a/README.development b/README.development
index 9daa656b9..61263dcfd 100644
--- a/README.development
+++ b/README.development
@@ -97,7 +97,9 @@ installed. Most likely you will need to have installed xcode
 
 Install homebrew (http://brew.sh/) and then install Anki prerequisites:
 
-$ brew install python PyQt mplayer lame portaudio
-$ pip install sqlalchemy
+$ brew install python mplayer lame portaudio
+$ pip install sqlalchemy pyqt5==5.9.2
+
+Make sure to specify pyqt5 version 5.9.2, as the latest version 5.10 is not currently supported.
 
 Now you can follow the development commands at the start of this document.