diff --git a/third_party/pigweed b/third_party/pigweed
index b94252d..421d853 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit b94252dfbbe500b2ec18c07389172c97ae78ad1f
+Subproject commit 421d8535ac97b4e136db146e0bf99f15ae91d833