diff --git a/third_party/yosys b/third_party/yosys
index 6f3376cbe..b66897e9b 160000
--- a/third_party/yosys
+++ b/third_party/yosys
@@ -1 +1 @@
-Subproject commit 6f3376cbe6dbd1e1513facc28930e837798c94e3
+Subproject commit b66897e9b985fdb3fba2b18b403cd32f2c7d7500