diff --git a/Makefile b/Makefile
index 7ef98d393..60ab2ccc2 100644
--- a/Makefile
+++ b/Makefile
@@ -127,7 +127,7 @@ LDFLAGS += -rdynamic
 LDLIBS += -lrt
 endif
 
-YOSYS_VER := 0.9+4306
+YOSYS_VER := 0.9+4309
 GIT_REV := $(shell git -C $(YOSYS_SRC) rev-parse --short HEAD 2> /dev/null || echo UNKNOWN)
 OBJS = kernel/version_$(GIT_REV).o