diff --git a/Makefile b/Makefile
index f9f09d501..5745d1d0c 100644
--- a/Makefile
+++ b/Makefile
@@ -159,7 +159,7 @@ ifeq ($(OS), Haiku)
 CXXFLAGS += -D_DEFAULT_SOURCE
 endif
 
-YOSYS_VER := 0.51+79
+YOSYS_VER := 0.51+85
 YOSYS_MAJOR := $(shell echo $(YOSYS_VER) | cut -d'.' -f1)
 YOSYS_MINOR := $(shell echo $(YOSYS_VER) | cut -d'.' -f2 | cut -d'+' -f1)
 YOSYS_COMMIT := $(shell echo $(YOSYS_VER) | cut -d'+' -f2)