diff --git a/third_party/pigweed b/third_party/pigweed
index 6422c9a..a9f2d91 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 6422c9ae137ad37a9ec172dcd95f294ce5631f82
+Subproject commit a9f2d91c85fe017e27ec94b7502984818cc7c723