diff --git a/vendor/github.com/packer-community/winrmcp/winrmcp/cp.go b/vendor/github.com/packer-community/winrmcp/winrmcp/cp.go
index 3d6a7f5d2..4d089c13d 100644
--- a/vendor/github.com/packer-community/winrmcp/winrmcp/cp.go
+++ b/vendor/github.com/packer-community/winrmcp/winrmcp/cp.go
@@ -176,13 +176,35 @@ func cleanupContent(client *winrm.Client, filePath string) error {
 	}
 
 	defer shell.Close()
-	cmd, err := shell.Execute("powershell", "Remove-Item", filePath, "-ErrorAction SilentlyContinue")
+	script := fmt.Sprintf(`
+		$tmp_file_path = [System.IO.Path]::GetFullPath("%s")
+		if (Test-Path $tmp_file_path) {
+			Remove-Item $tmp_file_path -ErrorAction SilentlyContinue
+		}
+	`, filePath)
+
+	cmd, err := shell.Execute(winrm.Powershell(script))
 	if err != nil {
 		return err
 	}
+	defer cmd.Close()
+
+	var wg sync.WaitGroup
+	copyFunc := func(w io.Writer, r io.Reader) {
+		defer wg.Done()
+		io.Copy(w, r)
+	}
+
+	wg.Add(2)
+	go copyFunc(os.Stdout, cmd.Stdout)
+	go copyFunc(os.Stderr, cmd.Stderr)
 
 	cmd.Wait()
-	cmd.Close()
+	wg.Wait()
+
+	if cmd.ExitCode() != 0 {
+		return fmt.Errorf("cleanup operation returned code=%d", cmd.ExitCode())
+	}
 	return nil
 }
 
diff --git a/vendor/vendor.json b/vendor/vendor.json
index f9a7b2935..1298f887d 100644
--- a/vendor/vendor.json
+++ b/vendor/vendor.json
@@ -2107,14 +2107,18 @@
 		{
 			"checksumSHA1": "dIMJD0AZwSwmuOuTaGgqWZkzuPU=",
 			"path": "github.com/packer-community/winrmcp",
-			"revision": "078cc0a785c9da54158c0775f06f505fc1e867f8",
-			"revisionTime": "2017-06-07T14:21:56Z"
+			"revision": "81144009af586de8e7729b829266f09dd0d59701",
+			"revisionTime": "2018-01-02T16:08:24Z",
+			"version": "master",
+			"versionExact": "master"
 		},
 		{
-			"checksumSHA1": "iApv8tX8vuAvzyY6VkOvW+IzJF8=",
+			"checksumSHA1": "/NoE6t3UkW4/iKAtbf59GGv6tF8=",
 			"path": "github.com/packer-community/winrmcp/winrmcp",
-			"revision": "078cc0a785c9da54158c0775f06f505fc1e867f8",
-			"revisionTime": "2017-06-07T14:21:56Z"
+			"revision": "81144009af586de8e7729b829266f09dd0d59701",
+			"revisionTime": "2018-01-02T16:08:24Z",
+			"version": "master",
+			"versionExact": "master"
 		},
 		{
 			"checksumSHA1": "rJab1YdNhQooDiBWNnt7TLWPyBU=",