diff --git a/configure.in b/configure.in
index 1099309..cf96e43 100644
--- a/configure.in
+++ b/configure.in
@@ -1,5 +1,5 @@
 AC_INIT(version.h)
-AC_PREREQ(2.50)
+AC_PREREQ(2.54)
 AC_CONFIG_AUX_DIR(config)
 AC_CONFIG_HEADERS([lib/config.h])
 AH_BOTTOM([#include "dirpaths.h"])