diff --git a/Makefile b/Makefile
index a21810253..875b4a0f2 100644
--- a/Makefile
+++ b/Makefile
@@ -129,7 +129,7 @@ LDFLAGS += -rdynamic
 LDLIBS += -lrt
 endif
 
-YOSYS_VER := 0.12+38
+YOSYS_VER := 0.12+40
 GIT_REV := $(shell git -C $(YOSYS_SRC) rev-parse --short HEAD 2> /dev/null || echo UNKNOWN)
 OBJS = kernel/version_$(GIT_REV).o