Laravel web application website url case sensitivity Upper case lower case

I have a web application build in php Laravel Framework version 5.1.19. It is running on plesk server, I am having problem with website url case sensitivity. Before the website was working in lower case url but know it does not work. I have to put the path in uppercase for eg: http://ift.tt/2E01MJV it was working before in this format but now it is not working but when I write http://ift.tt/2EPuSg8 it will work. Note Url used is just for demonstration. What should I do ?

via Chebli Mohamed