diff --git a/README.checkout b/README.checkout
index f4bf5b2c..477e69a1 100644
--- a/README.checkout
+++ b/README.checkout
@@ -8,7 +8,7 @@ Compiling From Repository Sources
    libiconv, libpsl, libpcre, pkg-config, libmetalink and GnuPG are not
    absolutely required):
 
-     * [20]autoconf (currently, GNU Wget requires version 2.61). This is
+     * [20]autoconf (currently, GNU Wget requires version 2.64). This is
        needed to generate the configure script from configure.in. This is
        not required when building from a tarball distribution; only when
        building from repository sources.
diff --git a/bootstrap.conf b/bootstrap.conf
index 7ebe221b..5e1014ad 100644
--- a/bootstrap.conf
+++ b/bootstrap.conf
@@ -140,7 +140,7 @@ gnulib_extra_files="
 
 # Build prerequisites
 buildreq="\
-autoconf   2.62
+autoconf   2.64
 automake   1.11.1
 autopoint  -
 gettext    0.17
diff --git a/configure.ac b/configure.ac
index bef2c827..f8c9e8e7 100644
--- a/configure.ac
+++ b/configure.ac
@@ -33,7 +33,7 @@ dnl
 AC_INIT([wget],
         m4_esyscmd([build-aux/git-version-gen .tarball-version]),
 	[bug-wget@gnu.org])
-AC_PREREQ(2.63)
+AC_PREREQ(2.64)
 
 dnl
 dnl What version of Wget are we building?