diff --git a/scripts/Windows/OS/Install.ps1 b/scripts/Windows/OS/Install.ps1
index c4cead65..405e4f81 100644
--- a/scripts/Windows/OS/Install.ps1
+++ b/scripts/Windows/OS/Install.ps1
@@ -1,4 +1,5 @@
 . "$PSScriptRoot/Manage.ps1";
+. "$PSScriptRoot/Upgrade.ps1";
 
 function Invoke-WindowsInstallation([Context] $context)
 {