Increment the version number.
diff --git a/README.md b/README.md
index 2c51503..fc20b14 100644
--- a/README.md
+++ b/README.md
@@ -10,7 +10,7 @@
 
 #### Latest version
 
-0.2.5
+0.2.6
 
 #### Description
 
diff --git a/configure.ac b/configure.ac
index 1e388ce..bc41b38 100644
--- a/configure.ac
+++ b/configure.ac
@@ -2,7 +2,7 @@
 # Process this file with autoconf to produce a configure script.
 
 AC_PREREQ([2.67])
-AC_INIT([marisa], [0.2.5], [susumu.yata@gmail.com])
+AC_INIT([marisa], [0.2.6], [susumu.yata@gmail.com])
 AC_CONFIG_SRCDIR([include/marisa.h])
 AM_INIT_AUTOMAKE([foreign])