diff --git a/window-main.go b/window-main.go
index 094c5fa..3e117fe 100644
--- a/window-main.go
+++ b/window-main.go
@@ -58,6 +58,11 @@ func mainTab(n *gui.Node) {
 	rn.NewButton("apt sources", func () {
 		xterm("cd ~/jcarr/setup; make setup-apt-sources; make setup-apt-file")
 	})
+	rn.NewButton("apt update", func () {
+		myGui.CloseToolkit("gocui")
+		doCmd("apt update")
+		os.Exit(0)
+	})
 	rn.NewButton("purge rc-only", func () {
 		xterm("cd ~/jcarr/setup; make reset-purge-rc-only-packages")
 	})