# iPhone + Snapchat not working SSL?

**URL:** <https://discourse.mitmproxy.org/t/iphone-snapchat-not-working-ssl/642>\
**Category:** help\
**Created:** [September 23, 2017, 6:37pm UTC](https://discourse.mitmproxy.org/t/iphone-snapchat-not-working-ssl/642 "2017-09-23T18:37:20Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![skydiver](https://avatars.discourse-cdn.com/v4/letter/s/da6949/32.png) [@skydiver](https://discourse.mitmproxy.org/u/skydiver)\
**Post date:** [September 23, 2017, 6:37pm UTC](https://discourse.mitmproxy.org/t/iphone-snapchat-not-working-ssl/642/1 "2017-09-23T18:37:20Z")

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I have mitmproxy installed fine on my MacBook Pro and also have downloaded the cert to my iPhone fine. I have been using it for some time and for most apps have no issue, however i have noticed snapchat and Facebook it doesn’t do anything, In snap chat is says could not refresh, and I’m thinking its doing to the SSL and I’m doing something wrong.

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**Author:** ![mhils](https://yyz2.discourse-cdn.com/flex030/user_avatar/discourse.mitmproxy.org/mhils/32/7_2.png) [@mhils](https://discourse.mitmproxy.org/u/mhils)\
**Post date:** [September 24, 2017, 10:26pm UTC](https://discourse.mitmproxy.org/t/iphone-snapchat-not-working-ssl/642/2 "2017-09-24T22:26:44Z")

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Hi,

you are running into certificate pinning: [http://docs.mitmproxy.org/en/stable/certinstall.html#certificate-pinning](http://docs.mitmproxy.org/en/stable/certinstall.html#certificate-pinning)