# Issue connecting to losant

**URL:** <https://forums.losant.com/t/issue-connecting-to-losant/2573>\
**Category:** Help\
**Tags:** mqtt\
**Created:** [January 26, 2020, 10:19pm UTC](https://forums.losant.com/t/issue-connecting-to-losant/2573 "2020-01-26T22:19:32Z")\
**Posts on this page:** 1\
**Showing post:** 9

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**Author:** ![Brandon\_Cannaday](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.losant.com/brandon_cannaday/32/14_2.png) [@Brandon\_Cannaday](https://forums.losant.com/u/Brandon_Cannaday)\
**Post date:** [February 6, 2020, 1:27am UTC](https://forums.losant.com/t/issue-connecting-to-losant/2573/9 "2020-02-06T01:27:27Z")

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Hey @Eddie_Elsenburg, this is because one of the underlying libraries (ArduinoJson) did a major update that is not compatible with our library.

You’ll want to ensure you’ve installed a 5.x version of the ArduinoJson library, and not the latest 6.x version.

 ![image](https://us1.discourse-cdn.com/flex015/uploads/getstructure/original/2X/c/c1ee9109d0f66b75ba86e3845d320f83be9161cf.png)

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