diff --git a/third_party/pigweed b/third_party/pigweed
index 2c042f9..66c5099 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 2c042f9c0098c30d132f0edf046dfa560bd18186
+Subproject commit 66c509979444b2de1954a12b9a8988066f5c65af