API 'certificate verify failed'

I get the following error when I try to request an api (using the OpenAQ API Wrapper):

SSLError: HTTPSConnectionPool(host='api.openaq.org', port=443): Max retries exceeded with url: /v2/measurements?city=Delhi&parameter=pm25 (Caused by SSLError(SSLError("bad handshake: Error([('SSL routines', 'tls_process_server_certificate', 'certificate verify failed')])")))


