diff --git a/korebuild-lock.txt b/korebuild-lock.txt
index ad704918df..4efe824526 100644
--- a/korebuild-lock.txt
+++ b/korebuild-lock.txt
@@ -1,2 +1,2 @@
-version:2.2.0-preview1-20180821.1
-commithash:c8d0cc52cd1abb697be24e288ffd54f8fae8bf17
+version:2.2.0-preview1-20180907.4
+commithash:730dc1470fcda5bb71ffff8271fa094c94a91e4a