diff --git a/odoo_install.sh b/odoo_install.sh
index a9d7901..6431080 100644
--- a/odoo_install.sh
+++ b/odoo_install.sh
@@ -49,8 +49,8 @@ ADMIN_EMAIL="odoo@example.com"
 ## https://github.com/odoo/odoo/wiki/Wkhtmltopdf ):
 ## https://www.odoo.com/documentation/13.0/setup/install.html#debian-ubuntu
 
-WKHTMLTOX_X64=https://github.com/wkhtmltopdf/wkhtmltopdf/releases/download/0.12.5/wkhtmltox_0.12.5-1.(lsb_release -c -s)_amd64.deb
-WKHTMLTOX_X32=https://github.com/wkhtmltopdf/wkhtmltopdf/releases/download/0.12.5/wkhtmltox_0.12.5-1.(lsb_release -c -s)_i386.deb
+WKHTMLTOX_X64="https://github.com/wkhtmltopdf/wkhtmltopdf/releases/download/0.12.5/wkhtmltox_0.12.5-1.$(lsb_release -c -s)_amd64.deb"
+WKHTMLTOX_X32="https://github.com/wkhtmltopdf/wkhtmltopdf/releases/download/0.12.5/wkhtmltox_0.12.5-1.$(lsb_release -c -s)_i386.deb"
 #--------------------------------------------------
 # Update Server
 #--------------------------------------------------