diff --git a/upstream b/upstream
index 8af62694..c6a8c40a 160000
--- a/upstream
+++ b/upstream
@@ -1 +1 @@
-Subproject commit 8af626949e671491365ad95039107a7d31a63a70
+Subproject commit c6a8c40ad5347ad8bd15b5438670dc9cf2f1307c