diff --git a/build-aux/GNUmakefile.in b/build-aux/GNUmakefile.in
index a507d443..53b05234 100644
--- a/build-aux/GNUmakefile.in
+++ b/build-aux/GNUmakefile.in
@@ -322,7 +322,7 @@ gen-announce:
 	$(GEN_ANNOUNCE)\
 	    --release-type=beta\
 	    --package-name=mes\
-	    --previous-version='0.19 '\
+	    --previous-version='0.20 '\
             --current-version=$(VERSION)\
 	    --gpg-key-id=$(GPG_KEY_ID)\
 	    --url-directory=https://ftp.gnu.org/gnu/mes\
diff --git a/configure b/configure
index d12170c0..44c44cb2 100755
--- a/configure
+++ b/configure
@@ -36,7 +36,7 @@ MES_ARENA=100000000 exec ${SCHEME-guile} -L . --no-auto-compile -e '(configure)'
 (define PACKAGE "mes")
 (define PACKAGE-NAME "GNU Mes")
 (define PACKAGE-BUGREPORT "bug-mes@gnu.org")
-(define VERSION "0.20")
+(define VERSION "0.21")
 
 (cond-expand
  (guile)
diff --git a/configure.sh b/configure.sh
index c6ae3881..edf57789 100755
--- a/configure.sh
+++ b/configure.sh
@@ -20,7 +20,7 @@
 
 set -e
 
-VERSION=0.20
+VERSION=0.21
 srcdir=${srcdir-$(dirname $0)}
 . ${srcdest}build-aux/trace.sh
 
diff --git a/guix/git/mes.scm b/guix/git/mes.scm
index e5dacc28..4ac69801 100644
--- a/guix/git/mes.scm
+++ b/guix/git/mes.scm
@@ -122,7 +122,7 @@ extensive examples, including parsers for the Javascript and C99 languages.")
 
 (define-public mes
   (let ((triplet "i686-unknown-linux-gnu")
-        (version "0.20"))
+        (version "0.21"))
     (package
       (name "mes")
       (version version)
@@ -164,7 +164,7 @@ Guile.")
       (license gpl3+))))
 
 (define-public mes.git
- (let ((version "0.20")
+ (let ((version "0.21")
         (revision "0")
         (commit (read-string (open-pipe "git show HEAD | head -1 | cut -d ' ' -f 2" OPEN_READ))))
     (package