diff --git a/configure.ac b/configure.ac
index 47190e934b8a57d66a4e294f2c876d92663b27dc..e301e1397d8f2ca7be16e3a853724a9e57fd1d95 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,7 +1,7 @@
 #                                               -*- Autoconf -*-
 
 AC_PREREQ([2.60])
-AC_INIT([knot], [1.3.2], [knot-dns@labs.nic.cz])
+AC_INIT([knot], [1.4.0-alpha], [knot-dns@labs.nic.cz])
 AM_INIT_AUTOMAKE([gnits subdir-objects dist-bzip2 dist-xz -Wall -Werror])
 AM_SILENT_RULES([yes])
 AC_CONFIG_SRCDIR([src/knot/main.c])