diff --git a/third_party/pigweed b/third_party/pigweed
index 947b968..a9c9b55 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 947b9681400b8ba5f0af01995354eeb06b393747
+Subproject commit a9c9b55ecde6d6b53416cea179c83c4d0e868da3