diff --git a/UpgradeTo20.04.md b/UpgradeTo20.04.md
index 0d2b0c1..9cb09e8 100644
--- a/UpgradeTo20.04.md
+++ b/UpgradeTo20.04.md
@@ -2,7 +2,7 @@
 
 notes on upgrading unbuntu from 18.04 to 20.04 for pan.do/ra
 
-    apt-get install ubuntu-release-upgrader-core
+    apt-get install ubuntu-release-upgrader-core software-properties-common
     do-release-upgrade
 
 Questions:
@@ -23,6 +23,8 @@ Stop all pan.do/ra processes (run as root):
 Enable pan.do/ra PPA again (run as root):
 
     sed -i "s/^# deb/deb/g" /etc/apt/sources.list.d/j*.list
+    add-apt-repository universe
+    apt install python3-venv
     apt update; apt upgrade; apt autoremove; apt clean
 
 New version of Postgres requires database migration (run as root):