PayPal is updating its services to require TLS 1.2 for all HTTPS connections.
Merchants and partners use HTTPS to securely connect with PayPal’s servers. PayPal use the Transport Layer Security (TLS) protocol to encrypt these communications. To ensure the security of our systems and adhere to industry best practices, PayPal is updating its services to require TLS 1.2 for all HTTPS connections by June 30, 2017. At this time, PayPal will also require HTTP/1.1 for all connections.