diff --git a/configure.ac b/configure.ac
index 7a4648bd..e5fe1011 100644
--- a/configure.ac
+++ b/configure.ac
@@ -3,7 +3,7 @@
 #
 AC_PREREQ([2.67])
 LT_PREREQ([2.2.6])
-AC_INIT([aria2],[1.16.3],[t-tujikawa@users.sourceforge.net],[aria2],[http://aria2.sourceforge.net/])
+AC_INIT([aria2],[1.16.4],[t-tujikawa@users.sourceforge.net],[aria2],[http://aria2.sourceforge.net/])
 AC_USE_SYSTEM_EXTENSIONS
 LT_INIT()
 AC_CONFIG_MACRO_DIR([m4])