# ISRG Root X1 not supported on ios 9.3.5

**URL:** <https://community.letsencrypt.org/t/isrg-root-x1-not-supported-on-ios-9-3-5/162193>\
**Category:** Help\
**Created:** [October 5, 2021, 5:36pm UTC](https://community.letsencrypt.org/t/isrg-root-x1-not-supported-on-ios-9-3-5/162193 "2021-10-05T17:36:05Z")\
**Posts on this page:** 3\
**Page:** 2

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**Author:** ![KarenZ](https://avatars.discourse-cdn.com/v4/letter/k/d07c76/32.png) [@KarenZ](https://community.letsencrypt.org/u/KarenZ)\
**Post date:** [October 16, 2021, 6:12pm UTC](https://community.letsencrypt.org/t/isrg-root-x1-not-supported-on-ios-9-3-5/162193/21 "2021-10-16T18:12:02Z")

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Thank you so much! This resolved my issue!

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**Author:** ![KarenZ](https://avatars.discourse-cdn.com/v4/letter/k/d07c76/32.png) [@KarenZ](https://community.letsencrypt.org/u/KarenZ)\
**Post date:** [October 16, 2021, 6:13pm UTC](https://community.letsencrypt.org/t/isrg-root-x1-not-supported-on-ios-9-3-5/162193/22 "2021-10-16T18:13:33Z")

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Thanks so much to everyone for all of the help on this issue. I have downloaded the certs manually and can now use Overdrive (and presumably Libby, their other app).

I have also forwarded them the info on their web server that was posted here!

Sorry for the delay in responding. Just got back from a vacation.

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**Author:** ![system](https://global.discourse-cdn.com/letsencrypt/original/3X/c/a/ca6c06ea1ea201324bba7048c6841ce60236468d.png) [@system](https://community.letsencrypt.org/u/system)\
**Post date:** [November 15, 2021, 6:13pm UTC](https://community.letsencrypt.org/t/isrg-root-x1-not-supported-on-ios-9-3-5/162193/23 "2021-11-15T18:13:36Z")

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Closed on November 15, 2021, 6:13pm UTC

This topic was automatically closed 30 days after the last reply. New replies are no longer allowed.

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