fileinput doesn't return multiple line in shiny

when i tried to do the simple example of fileInput something is not happening :

 library(shiny)
 ui <- fluidPage(
      fileInput("upload", NULL, buttonLabel = "Upload...", multiple = TRUE),
     tableOutput("files")
    )

server <- function(input, output, session) {
          output$files <- renderTable(input$upload)
                 }

shinyApp(ui, server)

I only get the recurrent file (single file), and not like this :

upload

I tried to change a browser but the same problem, or is there any way to upload multiple files?