diff --git a/scripts/install b/scripts/install
index edc8c69..1590d68 100644
--- a/scripts/install
+++ b/scripts/install
@@ -150,7 +150,7 @@ ynh_script_progression --message="Configuring system user..." --weight=2
 # Create a system user
 ynh_system_user_create --username=$app
 
-if [ $(grep -q "^render:" /etc/group) ]; then
+if grep -q "^render:" /etc/group; then
 	# Add user to render group
 	adduser $app render
 fi
@@ -218,11 +218,7 @@ needed_ports=()
 (( $discovery_client == 1 )) && needed_ports+=( "$discovery_client_port" )
 
 # Integrate service and require to expose the ports if needed
-if [[ -z ${needed_ports[@]} ]]; then
-	yunohost service add $app --description="Jellyfin media center"
-else
-	yunohost service add $app --description="Jellyfin media center" --needs_exposed_ports ${needed_ports[@]}
-fi
+yunohost service add $app --description="Jellyfin media center" ${needed_ports:+--needs_exposed_ports} "${needed_ports[@]}"
 
 #=================================================
 # START SYSTEMD SERVICE
diff --git a/scripts/restore b/scripts/restore
index 22da6d5..620b9ed 100644
--- a/scripts/restore
+++ b/scripts/restore
@@ -162,11 +162,7 @@ needed_ports=()
 (( $discovery_client == 1 )) && needed_ports+=( "$discovery_client_port" )
 
 # Integrate service and require to expose the ports if needed
-if [[ -z ${needed_ports[@]} ]]; then
-        yunohost service add $app --description="Jellyfin media center"
-else
-        yunohost service add $app --description="Jellyfin media center" --needs_exposed_ports ${needed_ports[@]}
-fi
+yunohost service add $app --description="Jellyfin media center" ${needed_ports:+--needs_exposed_ports} "${needed_ports[@]}"
 
 #=================================================
 # RESTORE THE LOGROTATE CONFIGURATION
diff --git a/scripts/upgrade b/scripts/upgrade
index 778f82e..efff534 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -241,11 +241,7 @@ needed_ports=()
 (( $discovery_client == 1 )) && needed_ports+=( "$discovery_client_port" )
 
 # Integrate service and require to expose the ports if needed
-if [[ -z ${needed_ports[@]} ]]; then
-        yunohost service add $app --description="Jellyfin media center"
-else
-        yunohost service add $app --description="Jellyfin media center" --needs_exposed_ports ${needed_ports[@]}
-fi
+yunohost service add $app --description="Jellyfin media center" ${needed_ports:+--needs_exposed_ports} "${needed_ports[@]}"
 
 #=================================================
 # START SYSTEMD SERVICE