diff --git a/third_party/pigweed/repo b/third_party/pigweed/repo
index cbbc73dc4d56bc..9640cdef100f87 160000
--- a/third_party/pigweed/repo
+++ b/third_party/pigweed/repo
@@ -1 +1 @@
-Subproject commit cbbc73dc4d56bc201e9d50c4b10db974aff82754
+Subproject commit 9640cdef100f87d7987875d3a418931d6500e5b2