diff --git a/upstream b/upstream
index b92b95e..a4988bb 160000
--- a/upstream
+++ b/upstream
@@ -1 +1 @@
-Subproject commit b92b95e2c26d5cea86acd3116ee029cc57676f14
+Subproject commit a4988bb3cd2d69ce3c934c2a1cf8aa7b16bab29b