diff --git a/tools/yosys b/tools/yosys
index a1bb0255d6..9ed031ddd5 160000
--- a/tools/yosys
+++ b/tools/yosys
@@ -1 +1 @@
-Subproject commit a1bb0255d654ffd0d8503577274f24b349a42995
+Subproject commit 9ed031ddd588442f22be13ce608547a5809b62f0