diff --git a/ChangeLog b/ChangeLog
index 3fde054b6d475f23551bfe31592475f4e689aa4c..5154cee4d1efc988a7178865df1aaee5b33fc5d2 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,8 @@
 2014-08-27  Niels Möller  <nisse@lysator.liu.se>
 
+	* configure.ac: Bumped package version number to 3.1.
+	(LIBHOGWEED_MAJOR): Bumped library version to 4.0.
+
 	Merged camellia-reorg changes (starting at 2014-07-04).
 	* Makefile.in (clean-here): Added ecc-25519.h.
 
diff --git a/configure.ac b/configure.ac
index ddee35c775c2314ab28ec9084212d2d6a4bf7767..19fe06cb47539312106fc236be96c853dc06406f 100644
--- a/configure.ac
+++ b/configure.ac
@@ -2,7 +2,7 @@ dnl -*- mode: shell-script; sh-indentation: 2; -*-
 
 dnl Process this file with autoconf to produce a configure script.
 
-AC_INIT([nettle], [3.0], [nettle-bugs@lists.lysator.liu.se])
+AC_INIT([nettle], [3.1], [nettle-bugs@lists.lysator.liu.se])
 AC_PREREQ(2.61)
 AC_CONFIG_SRCDIR([arcfour.c])
 # Needed to stop autoconf from looking for files in parent directories.
@@ -13,7 +13,7 @@ AC_CONFIG_HEADER([config.h])
 LIBNETTLE_MAJOR=5
 LIBNETTLE_MINOR=0
 
-LIBHOGWEED_MAJOR=3
+LIBHOGWEED_MAJOR=4
 LIBHOGWEED_MINOR=0
 
 AC_CANONICAL_HOST