# dropping support for Qt 5.6 and below
**URL:** https://discourse.vtk.org/t/dropping-support-for-qt-5-6-and-below/493
**Category:** Uncategorized
**Created:** [March 15, 2019, 3:28pm UTC](https://discourse.vtk.org/t/dropping-support-for-qt-5-6-and-below/493 "2019-03-15T15:28:32Z")
**Posts on this page:** 5
**Page:** 1
### Author:  [@utkarshayachit](https://discourse.vtk.org/u/utkarshayachit)
#### Post date: [March 15, 2019, 3:28pm UTC](https://discourse.vtk.org/t/dropping-support-for-qt-5-6-and-below/493/1 "2019-03-15T15:28:32Z")
Qt 5.6 LTS support ends [March 2019](https://blog.qt.io/blog/2018/11/29/support-qt-5-6-lts-ends-march-2019/). Consequently, I think we should drop support for 5.6 in VTK too. Thoughts? Objections?
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### Author:  [@mwestphal](https://discourse.vtk.org/u/mwestphal)
#### Post date: [March 15, 2019, 3:39pm UTC](https://discourse.vtk.org/t/dropping-support-for-qt-5-6-and-below/493/2 "2019-03-15T15:39:24Z")
+1. Qt 5.9 required seems logical.
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### Author:  [@estan](https://discourse.vtk.org/u/estan)
#### Post date: [March 15, 2019, 3:40pm UTC](https://discourse.vtk.org/t/dropping-support-for-qt-5-6-and-below/493/3 "2019-03-15T15:40:53Z")
No objections from us. We used to build our AppImage in a CentOS 6 container, which only had Qt 5.6 via EPEL repo, but we’ve moved that to CentOS 7 for which there is Qt 5.9.
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### Author:  [@utkarshayachit](https://discourse.vtk.org/u/utkarshayachit)
#### Post date: [March 16, 2019, 12:08pm UTC](https://discourse.vtk.org/t/dropping-support-for-qt-5-6-and-below/493/4 "2019-03-16T12:08:27Z")
Here’s an [MR](https://gitlab.kitware.com/vtk/vtk/merge_requests/5307) updating it to Qt 5.9 since 5.9 is the [oldest supported version](https://en.wikipedia.org/wiki/Qt_version_history) at end of 03/2019.
Will need to update dashboards before this MR gets merged, will do that in coming days/weeks.
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### Author:  [@utkarshayachit](https://discourse.vtk.org/u/utkarshayachit)
#### Post date: [May 7, 2019, 4:49pm UTC](https://discourse.vtk.org/t/dropping-support-for-qt-5-6-and-below/493/5 "2019-05-07T16:49:04Z")
update, the MR has been merged. Qt 5.9 is the minimum supported Qt version in VTK `master` as of today.