diff --git a/configure.ac b/configure.ac
index be257b9..0e725f4 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,6 +1,6 @@
 dnl Process this file with autoconf to produce a configure script.
 
-AC_INIT(libsxmp, 0.4.3)
+AC_INIT(libsxmp, 0.5.0)
 
 AC_CONFIG_HEADERS([config.h])
 
diff --git a/include/sxmp/version.h b/include/sxmp/version.h
index 3e066ad..0ee28c3 100644
--- a/include/sxmp/version.h
+++ b/include/sxmp/version.h
@@ -27,8 +27,8 @@
 #define	__SXMP_VERSION_H__
 
 #define SXMP_BRANCH  0
-#define SXMP_MAJOR   4
-#define SXMP_MINOR   3
+#define SXMP_MAJOR   5
+#define SXMP_MINOR   0
 
 #define V2_1_TPROT   "v2_1"