diff --git a/odoo_install.sh b/odoo_install.sh
index 5fd2a16..c371082 100644
--- a/odoo_install.sh
+++ b/odoo_install.sh
@@ -55,6 +55,8 @@ WKHTMLTOX_X32=https://github.com/wkhtmltopdf/wkhtmltopdf/releases/download/0.12.
 # Update Server
 #--------------------------------------------------
 echo -e "\n---- Update Server ----"
+# missing add-apt-repository in some cases
+sudo apt-get install software-properties-common -y
 # universe package is for Ubuntu 18.x
 sudo add-apt-repository universe
 # libpng12-0 dependency for wkhtmltopdf