diff --git a/Makefile b/Makefile
index e45b6abe3..785d21642 100644
--- a/Makefile
+++ b/Makefile
@@ -153,7 +153,7 @@ ifeq ($(OS), Haiku)
 CXXFLAGS += -D_DEFAULT_SOURCE
 endif
 
-YOSYS_VER := 0.49+17
+YOSYS_VER := 0.49+21
 
 # Note: We arrange for .gitcommit to contain the (short) commit hash in
 # tarballs generated with git-archive(1) using .gitattributes. The git repo