# Valid signature error when installing on Device

**URL:** <https://forums.kodeco.com/t/valid-signature-error-when-installing-on-device/29517>\
**Category:** iOS\
**Created:** [May 10, 2017, 12:47pm UTC](https://forums.kodeco.com/t/valid-signature-error-when-installing-on-device/29517 "2017-05-10T12:47:47Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![omnia6890](https://assets.chunter.kodeco.com/user_avatar/forums.kodeco.com/omnia6890/32/110970_2.png) [@omnia6890](https://forums.kodeco.com/u/omnia6890)\
**Post date:** [May 10, 2017, 12:47pm UTC](https://forums.kodeco.com/t/valid-signature-error-when-installing-on-device/29517/1 "2017-05-10T12:47:47Z")

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When I tried to install my app on iPhone I got this error:  
“The application does not have a valid signature”  
My first development target was: 10.3 and iPhone is 8.3 so I change it and remove StackViews to resolve errors.  
xCode version: 8.3.1 swift: 3.1  
I installed this 3rd party libraries with Carthage:  
-Alamofire  
-AlamofireImage  
-SwiftyJSON  
-Chameleon  
-Crashlytics  
-Fabric  
-DeviceKit  
-Kingfisher  
I’ve searched and find nothing.I’v tried to clean,rebuild,update carthage.

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**Author:** ![syedfa](https://assets.chunter.kodeco.com/user_avatar/forums.kodeco.com/syedfa/32/101500_2.png) [@syedfa](https://forums.kodeco.com/u/syedfa)\
**Post date:** [December 21, 2017, 4:51am UTC](https://forums.kodeco.com/t/valid-signature-error-when-installing-on-device/29517/2 "2017-12-21T04:51:21Z")

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@omnia6890 Thanks very much for your question! I found the following [answer](https://stackoverflow.com/questions/39187583/xcode-8-the-application-does-not-have-a-valid-signature) on StackOverflow which might be a possible solution to your problem.

I hope this helps!

All the best!