# Upgrade bootstrap js and css to latest version

**URL:** <https://forum.mautic.org/t/upgrade-bootstrap-js-and-css-to-latest-version/24556>\
**Category:** Development\
**Created:** [June 23, 2022, 7:18am UTC](https://forum.mautic.org/t/upgrade-bootstrap-js-and-css-to-latest-version/24556 "2022-06-23T07:18:12Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![khemych](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.mautic.org/khemych/32/2249_2.png) [@khemych](https://forum.mautic.org/u/khemych)\
**Post date:** [June 23, 2022, 7:18am UTC](https://forum.mautic.org/t/upgrade-bootstrap-js-and-css-to-latest-version/24556/1 "2022-06-23T07:18:12Z")

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Pls, can anybody help me - why mautic use old bootsrap library version ? how we can upgrade it ( i don’t see any related topic here ).

Will I have a lot of problems if try upgrade manually ?  
paths look like next = \app\bundles\CoreBundle\Assets\js\libraries\3.bootstrap.js

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**Author:** ![khemych](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.mautic.org/khemych/32/2249_2.png) [@khemych](https://forum.mautic.org/u/khemych)\
**Post date:** [June 24, 2022, 7:06am UTC](https://forum.mautic.org/t/upgrade-bootstrap-js-and-css-to-latest-version/24556/2 "2022-06-24T07:06:31Z")

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So far no one was interested in upgrade bootstrap to 5 version?  
I see that here we use less components - and in 5 version is SASS exists (

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**Author:** ![khemych](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.mautic.org/khemych/32/2249_2.png) [@khemych](https://forum.mautic.org/u/khemych)\
**Post date:** [June 25, 2022, 10:25am UTC](https://forum.mautic.org/t/upgrade-bootstrap-js-and-css-to-latest-version/24556/3 "2022-06-25T10:25:47Z")

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Hm… any ideas here ??  
or its will crash all js actions - and that same as we wrote mew version for mautic ?