diff --git a/third_party/pigweed/src b/third_party/pigweed/src
index 5b5c781..40d4c12 160000
--- a/third_party/pigweed/src
+++ b/third_party/pigweed/src
@@ -1 +1 @@
-Subproject commit 5b5c7815e957d3885ef62d5165604c60e26c2e64
+Subproject commit 40d4c1261275065d30e77ea68fbea69061b70e78