diff --git a/ChangeLog b/ChangeLog
index 3b97a07..a6e9b6d 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,4 +1,6 @@
-Current development
+2013-02-15 version 0.4.1:
+
+  * Fix header macro for clang
   * Fix configure.in for clang with -O4 option
   * Update autoconf script for distribution, exclude mplex sources
 
diff --git a/configure.in b/configure.in
index 7bf27c1..453f9e6 100644
--- a/configure.in
+++ b/configure.in
@@ -5,7 +5,7 @@ m4_include(m4/ax_check_link_flag.m4)
 AC_CONFIG_AUX_DIR(ac)
 AC_CANONICAL_TARGET
 
-AM_INIT_AUTOMAKE(jubatus_mpio, 0.4.0)
+AM_INIT_AUTOMAKE(jubatus_mpio, 0.4.1)
 AC_CONFIG_HEADER(config.h)
 
 # Default enabled -O4
diff --git a/mpsrc/Makefile.am b/mpsrc/Makefile.am
index 7de2199..d35539b 100644
--- a/mpsrc/Makefile.am
+++ b/mpsrc/Makefile.am
@@ -2,7 +2,7 @@
 
 lib_LTLIBRARIES = libjubatus_mpio.la
 
-libjubatus_mpio_la_LDFLAGS = -version-info 4:0:4
+libjubatus_mpio_la_LDFLAGS = -version-info 4:1:4
 libjubatus_mpio_la_CPPFLAGS = -I..
 
 libjubatus_mpio_la_SOURCES = \