diff --git a/makefile.shade b/makefile.shade
index 718ef178a3..396bf77f68 100644
--- a/makefile.shade
+++ b/makefile.shade
@@ -1,6 +1,6 @@
 use namespace="System.IO"
 
--BuildQuality = "preview3";
+-BuildQuality = "preview4";
 
 use-standard-lifecycle
 k-standard-goals