# RHEL/CentOS 6 OpenSSL client compatibility after DST Root CA X3 expiration

**URL:** <https://community.letsencrypt.org/t/rhel-centos-6-openssl-client-compatibility-after-dst-root-ca-x3-expiration/161032>\
**Category:** Help\
**Created:** [September 30, 2021, 4:59pm UTC](https://community.letsencrypt.org/t/rhel-centos-6-openssl-client-compatibility-after-dst-root-ca-x3-expiration/161032 "2021-09-30T16:59:46Z")\
**Posts on this page:** 1\
**Showing post:** 6

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**Author:** ![futureweb](https://sea3.discourse-cdn.com/letsencrypt/user_avatar/community.letsencrypt.org/futureweb/32/69239_2.png) [@futureweb](https://community.letsencrypt.org/u/futureweb)\
**Post date:** [September 30, 2021, 8:43pm UTC](https://community.letsencrypt.org/t/rhel-centos-6-openssl-client-compatibility-after-dst-root-ca-x3-expiration/161032/6 "2021-09-30T20:43:14Z")

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> [@Osiris](#):
>
> You probably need to add ISRG Root X1 to the root stores.

of course ... my fault ... corrected in posting ... thx! 🙂

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