diff --git a/third_party/pigweed b/third_party/pigweed
index 6d2b92a..9640cde 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 6d2b92a0ec934308801f2fff02e8662e4399b611
+Subproject commit 9640cdef100f87d7987875d3a418931d6500e5b2