Collection was modified; enumeration operation may not execute Delete all libraries

I need to delete all libraries from a subsite, however I got this error:

Collection was modified; enumeration operation may not execute



$web = Get-SPweb($webUrl)


  foreach($list in $web.Lists) {
    if($list.BaseType -eq "DocumentLibrary")
    {
        write-host $list.BaseType
        $web.Lists[$list.Title].Delete()
    }
  }