diff --git a/CHANGELOG b/CHANGELOG
index fde400117..42f264686 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -2,7 +2,7 @@
 List of major changes and improvements between releases
 =======================================================
 
-Yosys 0.19 .. Yosys 0.19-dev
+Yosys 0.19 .. Yosys 0.20
 --------------------------
  * New commands and options
     - Added option "-wb" to "read_liberty" pass
diff --git a/Makefile b/Makefile
index ba6d00a10..0232a8101 100644
--- a/Makefile
+++ b/Makefile
@@ -131,7 +131,7 @@ LDLIBS += -lrt
 endif
 endif
 
-YOSYS_VER := 0.19+45
+YOSYS_VER := 0.20
 
 # Note: We arrange for .gitcommit to contain the (short) commit hash in
 # tarballs generated with git-archive(1) using .gitattributes. The git repo
@@ -147,7 +147,7 @@ endif
 OBJS = kernel/version_$(GIT_REV).o
 
 bumpversion:
-	sed -i "/^YOSYS_VER := / s/+[0-9][0-9]*$$/+`git log --oneline a45c131.. | wc -l`/;" Makefile
+#	sed -i "/^YOSYS_VER := / s/+[0-9][0-9]*$$/+`git log --oneline a45c131.. | wc -l`/;" Makefile
 
 # set 'ABCREV = default' to use abc/ as it is
 #