diff --git a/scripts/install b/scripts/install
index a540a97..1bfc45b 100644
--- a/scripts/install
+++ b/scripts/install
@@ -85,10 +85,10 @@ ynh_app_setting_set $app port $port
 # ADD COLLABORA REPOSITORY
 #===============================================
 
-apt-get -yy install apt-transport-https
+ynh_install_app_dependencies apt-transport-https
 apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 0C54D189F4BA284D
 
-if [ "$(lsb_release --codename --short)" != "jessie" ]; then
+if [ "$(lsb_release --codename --short)" = "jessie" ]; then
 echo 'deb https://collaboraoffice.com/repos/CollaboraOnline/CODE-debian8 ./' | sudo tee -a /etc/apt/sources.list.d/collabora.list
 else