diff --git a/Makefile b/Makefile
index e8a38d97c..9337fb166 100644
--- a/Makefile
+++ b/Makefile
@@ -142,7 +142,7 @@ LDLIBS += -lrt
 endif
 endif
 
-YOSYS_VER := 0.23+10
+YOSYS_VER := 0.23+21
 
 # Note: We arrange for .gitcommit to contain the (short) commit hash in
 # tarballs generated with git-archive(1) using .gitattributes. The git repo