diff --git a/standards.md b/standards.md
index ff2fc2b01..f54bfae27 100644
--- a/standards.md
+++ b/standards.md
@@ -8,6 +8,7 @@ Transport                        | IMAP v4 ([RFC 3501](https://tools.ietf.org/ht
 Embedded media                   | MIME Document Series ([RFC 2045](https://tools.ietf.org/html/rfc2045), [RFC 2046](https://tools.ietf.org/html/rfc2046)), Content-Disposition Header ([RFC 2183](https://tools.ietf.org/html/rfc2183)), Multipart/Related ([RFC 2387](https://tools.ietf.org/html/rfc2387))
 Identify server folders          | IMAP LIST Extension ([RFC 6154](https://tools.ietf.org/html/rfc6154))
 Push                             | IMAP IDLE ([RFC 2177](https://tools.ietf.org/html/rfc2177))
+Authorization                    | OAuth2 ([RFC 6749](https://tools.ietf.org/html/rfc6749))
 End-to-end encryption            | [Autocrypt Level 1](https://autocrypt.org/level1.html), OpenPGP ([RFC 4880](https://tools.ietf.org/html/rfc4880)) and Security Multiparts for MIME ([RFC 1847](https://tools.ietf.org/html/rfc1847))
 Configuration assistance         | [Autoconfigure](https://developer.mozilla.org/en-US/docs/Mozilla/Thunderbird/Autoconfiguration) and [Autodiscover](https://technet.microsoft.com/library/bb124251(v=exchg.150).aspx)
 Messenger functions              | [Email-chat](https://github.com/deltachat/spec/blob/master/spec.md#email-chat-specification)