diff --git a/setup/install_craft.ps1 b/setup/install_craft.ps1
--- a/setup/install_craft.ps1
+++ b/setup/install_craft.ps1
@@ -4,16 +4,16 @@
     [alias("branch")][string]$Script:branch="master"
     )
 
-
+[Net.ServicePointManager]::SecurityProtocol = "SystemDefault, tls12, tls11"
 [version]$minPythonVersion = 3.6
 $Script:PythonInstallDir = "C:\python36"
 if($env:PROCESSOR_ARCHITECTURE.contains("64"))
 {
-    $Script:pythonUrl = "https://www.python.org/ftp/python/3.6.2/python-3.6.2-amd64.exe"
+    $Script:pythonUrl = "https://www.python.org/ftp/python/3.6.6/python-3.6.6-amd64.exe"
 }
 else
 {
-    $Script:pythonUrl = "https://www.python.org/ftp/python/3.6.2/python-3.6.2.exe"
+    $Script:pythonUrl = "https://www.python.org/ftp/python/3.6.6/python-3.6.6.exe"
 }
 #####
 $Script:pythonVersion = "0"
@@ -37,7 +37,8 @@
                 $archive = "$Script:installRoot\download\{0}" -f ( $Script:pythonUrl.SubString($Script:pythonUrl.LastIndexOf("/")+1))
                 if(!(Test-Path -Path $archive))
                 {
-                    Invoke-WebRequest $Script:pythonUrl -OutFile $archive
+                    Write-Host "Downloading:" $Script:pythonUrl
+                    (new-object net.webclient).DownloadFile("$Script:pythonUrl", "$archive")
                 }
                 [string[]]$command = @("/quiet", "InstallAllUsers=0", "PrependPath=1", "TargetDir=`"$Script:PythonInstallDir`"", "AssociateFiles=0",  "InstallLauncherAllUsers=0")
                 Write-Host "$archive" $command