diff --git a/configure.ac b/configure.ac
index 41877dce..54065982 100644
--- a/configure.ac
+++ b/configure.ac
@@ -6,11 +6,11 @@
 m4_define([libpinyin_released], [1])
 m4_define([libpinyin_major_version], [1])
 m4_define([libpinyin_minor_version], [1])
-m4_define([libpinyin_micro_version], [0])
+m4_define([libpinyin_micro_version], [91])
 m4_define(libpinyin_maybe_datestamp,
     m4_esyscmd([if test x]libpinyin_released[ != x1; then date +.%Y%m%d | tr -d '\n\r'; fi]))
 
-m4_define([libpinyin_abi_current], [5])
+m4_define([libpinyin_abi_current], [6])
 m4_define([libpinyin_abi_revision], [0])
 
 m4_define([libpinyin_version],