Supervisor doesn't recognize environment variable in Nodejs

This is my supervisor setting for a NodeJS API, but the NODE_ENV variable doesn't get recognized. API works in Default mode right now. But I want it to run it in NODE_ENV development

[program:api]
command=/usr/bin/node /srv/apps/api/src/index.js
directory=/srv/apps/api
autostart=true
autorestart=true
startretries=3
stderr_logfile=/srv/logs/api/error.log
stdout_logfile=/srv/logs/api/out.log
user=api-user
environment= NODE_ENV="development"

Any ideas?