# Inserting Javascript yields 403 error

**URL:** <https://meta.discourse.org/t/inserting-javascript-yields-403-error/154738>\
**Category:** Development\
**Created:** [June 13, 2020, 9:42am UTC](https://meta.discourse.org/t/inserting-javascript-yields-403-error/154738 "2020-06-13T09:42:31Z")\
**Posts on this page:** 1\
**Showing post:** 1

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**Author:** ![Judith](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/judith/32/289903_2.png) [@Judith](https://meta.discourse.org/u/Judith)\
**Post date:** [June 13, 2020, 9:42am UTC](https://meta.discourse.org/t/inserting-javascript-yields-403-error/154738/1 "2020-06-13T09:42:32Z")

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According to previous posts in this forum, it should be possible to insert custom Javascript code into the or fields of the default theme, but whenever I try to do so, I get a popup saying “403 error”. Given that I am the admin but not a developer, how can I add my one line of custom Javascript?

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