# Jekyll 4.2.0 Please append \`--trace\` to the \`serve\` command Error

**URL:** <https://talk.jekyllrb.com/t/jekyll-4-2-0-please-append-trace-to-the-serve-command-error/5661>\
**Category:** Help\
**Created:** [February 18, 2021, 6:10pm UTC](https://talk.jekyllrb.com/t/jekyll-4-2-0-please-append-trace-to-the-serve-command-error/5661 "2021-02-18T18:10:19Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![rizwaan91](https://avatars.discourse-cdn.com/v4/letter/r/e5b9ba/32.png) [@rizwaan91](https://talk.jekyllrb.com/u/rizwaan91)\
**Post date:** [February 18, 2021, 6:20pm UTC](https://talk.jekyllrb.com/t/jekyll-4-2-0-please-append-trace-to-the-serve-command-error/5661/2 "2021-02-18T18:20:05Z")

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Managed to fix it

Thanks [ashmaroli](https://talk.jekyllrb.com/u/ashmaroli)

Changed the line the Gemfile line of gem “jekyll”, “~\> 4.2.0” to the suggestion and it worked!

> [@Missing gem even though I've installed it](https://talk.jekyllrb.com/t/missing-gem-even-though-ive-installed-it/4031/13):
>
> Line 5: gem "jekyll" to gem 'jekyll', github: 'jekyll/jekyll'

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