diff --git a/tools/yosys b/tools/yosys
index 863f409..9ed031d 160000
--- a/tools/yosys
+++ b/tools/yosys
@@ -1 +1 @@
-Subproject commit 863f40978e798f8002bac989a1cb1c755ef1165e
+Subproject commit 9ed031ddd588442f22be13ce608547a5809b62f0