diff --git a/third_party/pigweed/repo b/third_party/pigweed/repo
index 9640cdef100f87..acad2170df4937 160000
--- a/third_party/pigweed/repo
+++ b/third_party/pigweed/repo
@@ -1 +1 @@
-Subproject commit 9640cdef100f87d7987875d3a418931d6500e5b2
+Subproject commit acad2170df4937c509fe2cd7337a47627a783596