# Highlight does not work

**URL:** <https://meta.discourse.org/t/highlight-does-not-work/227580>\
**Category:** Support\
**Created:** [May 20, 2022, 8:38am UTC](https://meta.discourse.org/t/highlight-does-not-work/227580 "2022-05-20T08:38:32Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![KevinBlandy](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/kevinblandy/32/155478_2.png) [@KevinBlandy](https://meta.discourse.org/u/KevinBlandy)\
**Post date:** [May 20, 2022, 8:38am UTC](https://meta.discourse.org/t/highlight-does-not-work/227580/1 "2022-05-20T08:38:33Z")

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![image](https://global.discourse-cdn.com/meta/original/4X/1/9/8/198d7009c09fd7254fced92bce3815beaea78e03.png)

 ![image](https://global.discourse-cdn.com/meta/original/4X/9/f/0/9f00edc048a6855a7da3d03eda8ab76024716311.png)

I declared the syntax format of the code block as: `yaml`. But as you can see, it doesn’t work. And the console prints some warning messages.

How can I deal with this problem?

Thanks!

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<div class="post-metadata">

**Author:** ![JammyDodger](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/jammydodger/32/254611_2.png) [@JammyDodger](https://meta.discourse.org/u/JammyDodger)\
**Post date:** [May 20, 2022, 1:42pm UTC](https://meta.discourse.org/t/highlight-does-not-work/227580/2 "2022-05-20T13:42:15Z")

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It doesn’t look like `yaml` is one of the default `highlighted languages`. I think you need to add it to that admin setting, and then it should work. 🤞