diff --git a/scripts/python-osm-ro.postinst b/scripts/python-osm-ro.postinst
index f8670d3..615cbc4 100755
--- a/scripts/python-osm-ro.postinst
+++ b/scripts/python-osm-ro.postinst
@@ -28,6 +28,8 @@
 pip install --upgrade prettytable
 pip install --upgrade pyvmomi
 pip install --upgrade pyang pyangbind
+pip install untangle
+pip install -e git+https://github.com/python-oca/python-oca#egg=oca
 
 systemctl enable osm-ro.service