diff --git a/provisioner/chef-client/provisioner.go b/provisioner/chef-client/provisioner.go
index 3853613fc..c7bd865dd 100644
--- a/provisioner/chef-client/provisioner.go
+++ b/provisioner/chef-client/provisioner.go
@@ -30,13 +30,13 @@ type guestOSTypeConfig struct {
 var guestOSTypeConfigs = map[string]guestOSTypeConfig{
 	provisioner.UnixOSType: {
 		executeCommand: "{{if .Sudo}}sudo {{end}}chef-client --no-color -c {{.ConfigPath}} -j {{.JsonPath}}",
-		installCommand: "curl -L https://www.chef.io/chef/install.sh | {{if .Sudo}}sudo {{end}}bash",
+		installCommand: "curl -L https://omnitruck.chef.io/install.sh | {{if .Sudo}}sudo {{end}}bash",
 		knifeCommand:   "{{if .Sudo}}sudo {{end}}knife {{.Args}} {{.Flags}}",
 		stagingDir:     "/tmp/packer-chef-client",
 	},
 	provisioner.WindowsOSType: {
 		executeCommand: "c:/opscode/chef/bin/chef-client.bat --no-color -c {{.ConfigPath}} -j {{.JsonPath}}",
-		installCommand: "powershell.exe -Command \"(New-Object System.Net.WebClient).DownloadFile('http://chef.io/chef/install.msi', 'C:\\Windows\\Temp\\chef.msi');Start-Process 'msiexec' -ArgumentList '/qb /i C:\\Windows\\Temp\\chef.msi' -NoNewWindow -Wait\"",
+		installCommand: "powershell.exe -Command \". { iwr -useb https://omnitruck.chef.io/install.ps1 } | iex; install\"",
 		knifeCommand:   "c:/opscode/chef/bin/knife.bat {{.Args}} {{.Flags}}",
 		stagingDir:     "C:/Windows/Temp/packer-chef-client",
 	},