diff --git a/third_party/pigweed b/third_party/pigweed
index 19f3cfd..4a9f39c 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 19f3cfd63b9f1c6b43a0da1d49e2bad140d43a27
+Subproject commit 4a9f39c6086e117dfc376452865c57ed0d3fa1b9