diff --git a/scripts/update.sh b/scripts/update.sh
index 918847516..25c3d1fd8 100755
--- a/scripts/update.sh
+++ b/scripts/update.sh
@@ -31,6 +31,7 @@ else
 	OSNAME='unknow'
 fi
 
+pip uninstall public
 
 if [ "$OSNAME" == 'MAC' ];then
 	echo 'The development environment only needs to be downloaded again!'