diff --git a/configure.ac b/configure.ac
index ad07c24..da8dee4 100644
--- a/configure.ac
+++ b/configure.ac
@@ -41,7 +41,7 @@ dnl *                                                                         *
 dnl ***************************************************************************/
 
 m4_define([version_major], [0])
-m4_define([version_minor], [20])
+m4_define([version_minor], [21])
 m4_define([version_revision], [0])
 
 AC_PREREQ(2.53)