diff --git a/third_party/pigweed b/third_party/pigweed
index 3c3dc00..4220d40 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 3c3dc003812d05bb31a47b93ff1df5666ad3db7f
+Subproject commit 4220d40b339b05bbaf9636435ddee68750b39383