diff --git a/configure b/configure
index cab6fa8..342a2bc 100755
--- a/configure
+++ b/configure
@@ -127,12 +127,12 @@ done
 : ${INSTALL_PROGRAM_STRIP:=${INSTALL} -m 755 -s}
 : ${INSTALL_MAN:=${INSTALL} -m 444}
 : ${INSTALL_LIB:=${INSTALL} -m 755 -c}
- PKGNAME='r2flutter' ; VERSION='0.3.6' ; VERSION_MAJOR=0; VERSION_MINOR=3; VERSION_PATCH=6; VERSION_NUMBER=00306; CONTACT_MAIL="pancake@nopcode.org" ; CONTACT_NAME="pancake" ; CONTACT="pancake <pancake@nopcode.org>" ;
+ PKGNAME='r2flutter' ; VERSION='0.4.0' ; VERSION_MAJOR=0; VERSION_MINOR=4; VERSION_PATCH=0; VERSION_NUMBER=00400; CONTACT_MAIL="pancake@nopcode.org" ; CONTACT_NAME="pancake" ; CONTACT="pancake <pancake@nopcode.org>" ;
 }
 
 show_usage() {
 cat <<EOF2
-'configure' configures r2flutter-0.3.6 to adapt to many kinds of systems.
+'configure' configures r2flutter-0.4.0 to adapt to many kinds of systems.
 
 Usage: ./configure [OPTION]... [VAR=VALUE]...
 
@@ -214,10 +214,10 @@ ocho() {
 
 show_version() {
 if [ "$QUIET" = 1 ]; then
-	echo "0.3.6"
+	echo "0.4.0"
 	exit 0
 fi
-echo "r2flutter-0.3.6 configuration script done with acr v2.2.8.
+echo "r2flutter-0.4.0 configuration script done with acr v2.2.8.
 The 'Free Software Foundation' message is only for autodetection.
 Originally written by pancake <nopcode.org>."
 exit 0
@@ -246,7 +246,7 @@ case $flag in
 	show_version ; ;;
 -r|--r|--report)
 echo "PKGNAME:     r2flutter"
-echo "VERSION:     0.3.6"
+echo "VERSION:     0.4.0"
 echo "AUTHOR:      pancake"
 echo "EMAIL:       pancake@nopcode.org"
 echo "LANGS:       c"
diff --git a/configure.acr b/configure.acr
index 494c152..0d62809 100644
--- a/configure.acr
+++ b/configure.acr
@@ -1,5 +1,5 @@
 PKGNAME r2flutter
-VERSION 0.3.6
+VERSION 0.4.0
 CONTACT pancake ; pancake@nopcode.org
 
 LANG_C!
diff --git a/include/r2flutter/r2flutter_version.h b/include/r2flutter/r2flutter_version.h
index d74035e..99ca392 100644
--- a/include/r2flutter/r2flutter_version.h
+++ b/include/r2flutter/r2flutter_version.h
@@ -1,9 +1,9 @@
 #ifndef R2FLUTTER_VERSION_H
 #define R2FLUTTER_VERSION_H
 
-#define R2FLUTTER_VERSION "0.3.6"
+#define R2FLUTTER_VERSION "0.4.0"
 #define R2FLUTTER_VERSION_MAJOR 0
-#define R2FLUTTER_VERSION_MINOR 3
-#define R2FLUTTER_VERSION_PATCH 6
+#define R2FLUTTER_VERSION_MINOR 4
+#define R2FLUTTER_VERSION_PATCH 0
 
 #endif
diff --git a/meson.build b/meson.build
index 50538df..78f4887 100644
--- a/meson.build
+++ b/meson.build
@@ -1,7 +1,7 @@
 project(
   'r2flutter',
   'c',
-  version : '0.3.6',
+version : '0.4.0',
   meson_version : '>=0.56.0',
   default_options : ['warning_level=2', 'werror=false']
 )