diff --git a/Makefile b/Makefile
index 085b43415..ce0c737d4 100644
--- a/Makefile
+++ b/Makefile
@@ -68,7 +68,7 @@ else
 	LDLIBS += -lrt
 endif
 
-YOSYS_VER := 0.5+$(shell cd $(YOSYS_SRC) && test -d .git && { git log --author=clifford@clifford.at --oneline c3c9fbfb8c678.. | wc -l; })
+YOSYS_VER := 0.6
 GIT_REV := $(shell cd $(YOSYS_SRC) && git rev-parse --short HEAD 2> /dev/null || echo UNKNOWN)
 OBJS = kernel/version_$(GIT_REV).o