diff --git a/scripts/python-osm-ro.postinst b/scripts/python-osm-ro.postinst
index d697afe..b2a2ff2 100755
--- a/scripts/python-osm-ro.postinst
+++ b/scripts/python-osm-ro.postinst
@@ -23,10 +23,11 @@
 
 #Pip packages required for vmware connector
 pip install --upgrade pip
-pip install pyvcloud
-pip install progressbar
-pip install prettytable
-pip install pyvmomi
+pip install --upgrade pyvcloud
+pip install --upgrade progressbar
+pip install --upgrade prettytable
+pip install --upgrade pyvmomi
+pip install --upgrade pyang pyangbind
 
 systemctl enable osm-ro.service