diff --git a/configure.ac b/configure.ac
index 4ce30677..5c4be562 100644
--- a/configure.ac
+++ b/configure.ac
@@ -19,7 +19,7 @@
 # SPDX-License-Identifier: LGPL-2.1-or-later
 
 # (Process this file with autoconf to produce a configure script.)
-AC_PREREQ([2.59])
+AC_PREREQ([2.69])
 min_automake_version="1.14"
 
 # To build a release you need to create a tag with the version number
@@ -96,8 +96,8 @@ VERSION_MICRO=mym4_micro
 
 AC_CONFIG_AUX_DIR([build-aux])
 AC_CONFIG_MACRO_DIR([m4])
-AC_CONFIG_SRCDIR(src/gpgme.h.in)
-AC_CONFIG_HEADER(conf/config.h)
+AC_CONFIG_SRCDIR([src/gpgme.h.in])
+AC_CONFIG_HEADERS([conf/config.h])
 AM_INIT_AUTOMAKE([serial-tests dist-bzip2 no-dist-gzip])
 AM_MAINTAINER_MODE
 AC_CANONICAL_HOST