diff --git a/configure.ac.in b/configure.ac.in
index 9a62825862f5b7f20a5b1ece472b3893de227d55..0c4ea81963fbde44d0630a3126fa1443cf8aa790 100644
--- a/configure.ac.in
+++ b/configure.ac.in
@@ -8,7 +8,7 @@ m4_define([dict_version], [0.6.0])
 
 dnl init autoconf
 AC_INIT([xfce4-dict], [dict_version], [http://bugzilla.xfce.org/])
-AC_PREREQ([2.50])
+AC_PREREQ([2.53])
 
 m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])