Deploying application to shinyapps.io

I have alredy installed httpuv package but when i am trying to deploy application to shiny server. I am getting below error:
reparing to deploy application...DONE
Uploading bundle for application: 1049884...Error:

  • Application depends on package "httpuv" but it is not installed.
    Please resolve before continuing.
    Execution halted

Thanks in advance!