diff --git a/scripts/change_url b/scripts/change_url
index c595362..85a7d71 100644
--- a/scripts/change_url
+++ b/scripts/change_url
@@ -27,7 +27,7 @@ app=$YNH_APP_INSTANCE_NAME
 ynh_script_progression --message="Loading installation settings..." --weight=1
 
 # Needed for helper "ynh_add_nginx_config"
-final_path=$(ynh_app_setting_get --app=$app --key=final_path)
+final_path=$(ynh_app_setting_get --app="$app" --key=final_path)
 
 #=================================================
 # CHECK WHICH PARTS SHOULD BE CHANGED
@@ -52,7 +52,7 @@ fi
 #=================================================
 ynh_script_progression --message="Stopping a systemd service..." --weight=1
 
-ynh_systemd_action --service_name=$app --action="stop" --log_path="systemd" --line_match="Stopped Bitwarden Server"
+ynh_systemd_action --service_name="$app" --action="stop" --log_path="systemd" --line_match="Stopped Bitwarden Server"
 
 #=================================================
 # MODIFY URL IN NGINX CONF
@@ -78,7 +78,7 @@ if [ $change_domain -eq 1 ]
 then
 	# Delete file checksum for the old conf file location
 	ynh_delete_file_checksum --file="$nginx_conf_path"
-	mv $nginx_conf_path /etc/nginx/conf.d/$new_domain.d/$app.conf
+	mv "$nginx_conf_path" /etc/nginx/conf.d/"$new_domain".d/"$app".conf
 	# Store file checksum for the new config file location
 	ynh_store_file_checksum --file="/etc/nginx/conf.d/$new_domain.d/$app.conf"
 fi
@@ -96,9 +96,9 @@ fi
 #=================================================
 ynh_script_progression --message="Starting a systemd service..." --weight=1
 
-ynh_systemd_action --service_name=$app --action="start" --log_path="systemd" --line_match="Rocket has launched from"
-if [ ${PACKAGE_CHECK_EXEC:-0} -eq 1 ]; then
-	ynh_systemd_action --service_name=$app --action="restart" --log_path="systemd" --line_match="Rocket has launched from"
+ynh_systemd_action --service_name="$app" --action="start" --log_path="systemd" --line_match="Rocket has launched from"
+if [ "${PACKAGE_CHECK_EXEC:-0}" -eq 1 ]; then
+	ynh_systemd_action --service_name="$app" --action="restart" --log_path="systemd" --line_match="Rocket has launched from"
 fi
 
 #=================================================