# Custom JWT Header

**URL:** <https://forum.keycloak.org/t/custom-jwt-header/824>\
**Category:** Miscellanaeous\
**Created:** [January 2, 2020, 2:39pm UTC](https://forum.keycloak.org/t/custom-jwt-header/824 "2020-01-02T14:39:50Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![medamine123](https://yyz2.discourse-cdn.com/free1/user_avatar/forum.keycloak.org/medamine123/32/2530_2.png) [@medamine123](https://forum.keycloak.org/u/medamine123)\
**Post date:** [January 2, 2020, 2:39pm UTC](https://forum.keycloak.org/t/custom-jwt-header/824/1 "2020-01-02T14:39:50Z")

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Hi  
How can i custom keycloak header?  
I need to add x5c attribute in the header of the jwt token.

Thanks