diff --git a/configure.in b/configure.in
index 70522d614fb4c7ca0abccb21086a7300f98a8b06..3848a59f0c1b7c97b4e44428fdbd7c0ade5bf819 100644
--- a/configure.in
+++ b/configure.in
@@ -5,7 +5,7 @@ dnl Process this file with autoconf to produce a configure script.
 
 AC_INIT(arcfour.c)
 
-AM_INIT_AUTOMAKE(nettle, 1.1)
+AM_INIT_AUTOMAKE(nettle, 1.5)
 
 AM_CONFIG_HEADER(config.h)