diff --git a/scripts/install b/scripts/install
index e5935e0..73c2850 100644
--- a/scripts/install
+++ b/scripts/install
@@ -56,7 +56,7 @@ ynh_app_setting_set $app is_public $is_public
 
 #Install dependencies
 sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv 7F0CEB10 >/dev/null
-echo "deb http://repo.mongodb.org/apt/debian wheezy/mongodb-org/3.0 main" | sudo tee /etc/apt/sources.list.d/mongodb-org-3.0.list
+echo "deb http://repo.mongodb.org/apt/debian jessie/mongodb-org/3.4 main" | sudo tee /etc/apt/sources.list.d/mongodb-org-3.4.list
 sudo apt-get update
 sudo apt-get install -y mongodb-org gzip curl graphicsmagick npm
 
@@ -71,7 +71,7 @@ sudo n $NODE_VERSION
 sudo mkdir -p $final_path
 
 # Create user
-sudo useradd -d "$final_path" -M $serviceuser
+id -u $serviceuser || sudo useradd -d "$final_path" -M $serviceuser
 
 # Copy and set systemd configuration
 sed -i "s@#ROOTURL#@$domain@g" ../conf/rocketchat.service
diff --git a/scripts/remove b/scripts/remove
index d240c6d..e025c1f 100644
--- a/scripts/remove
+++ b/scripts/remove
@@ -13,7 +13,6 @@ source /usr/share/yunohost/helpers
 app=$YNH_APP_INSTANCE_NAME
 domain=$(ynh_app_setting_get $app domain)
 final_path=$(ynh_app_setting_get $app final_path)
-serviceuser=$(ynh_app_setting_get $app serviceuser)
 
 sudo systemctl stop $app.service
 
@@ -28,8 +27,5 @@ sudo rm -f /etc/systemd/system/$app.service
 # remove database!!!
 sudo mongo rocketchat --eval "db.dropDatabase()"
 
-# remove user!!!
-sudo userdel -r $serviceuser
-
 sudo systemctl daemon-reload
 sudo systemctl reload nginx
diff --git a/scripts/restore b/scripts/restore
index 4291773..c261bd5 100644
--- a/scripts/restore
+++ b/scripts/restore
@@ -39,7 +39,7 @@ sudo yunohost app checkurl "${domain}${path}" -a "$app" || ynh_die
 sudo mkdir -p $final_path
 
 # Create user
-sudo useradd -d "$final_path" -M $serviceuser
+id -u $serviceuser || sudo useradd -d "$final_path" -M $serviceuser
 
 #=================================================
 # STANDARD RESTORATION STEPS