diff --git a/tools/yosys b/tools/yosys
index 863f409..8ffca44 160000
--- a/tools/yosys
+++ b/tools/yosys
@@ -1 +1 @@
-Subproject commit 863f40978e798f8002bac989a1cb1c755ef1165e
+Subproject commit 8ffca44e62fbbde7e205751bb604520aeda70ef3