diff --git a/third_party/yosys b/third_party/yosys
index a9795c4f..31c15e5f 160000
--- a/third_party/yosys
+++ b/third_party/yosys
@@ -1 +1 @@
-Subproject commit a9795c4fce52f825fbb455daa74b4d126a289ff6
+Subproject commit 31c15e5fa60b8cb47e7785fc420d90e860708034