diff --git a/m4.spec b/m4.spec
index 810f91a..89ba8cb 100644
--- a/m4.spec
+++ b/m4.spec
@@ -1,13 +1,14 @@
-Summary: The GNU macro processor
+Summary: GNU macro processor
 Name: m4
 Version: 1.4.18
-Release: 16%{?dist}
+Release: 17%{?dist}
 License: GPLv3+
-Source0: http://ftp.gnu.org/gnu/m4/m4-%{version}.tar.xz
-Source1: http://ftp.gnu.org/gnu/m4/m4-%{version}.tar.xz.sig
+Source0: https://ftp.gnu.org/gnu/m4/m4-%{version}.tar.xz
+Source1: https://ftp.gnu.org/gnu/m4/m4-%{version}.tar.xz.sig
 # Patch0: update to glibc libio.h removal, rhbz#1573342
 Patch0: m4-1.4.18-glibc-change-work-around.patch
-URL: http://www.gnu.org/software/m4/
+URL: https://www.gnu.org/software/m4/
+BuildRequires: make
 BuildRequires: gcc autoconf automake
 %ifarch ppc ppc64
 BuildRequires: texinfo
@@ -51,6 +52,9 @@ make %{?_smp_mflags} check
 %{_mandir}/man1/m4.1*
 
 %changelog
+* Tue Jan 26 2021 Fedora Release Engineering <releng@fedoraproject.org> - 1.4.18-17
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_34_Mass_Rebuild
+
 * Tue Oct 13 2020 Vitezslav Crhonek <vcrhonek@redhat.com> - 1.4.18-16
 - Drop workaround introduced in previous release
   Resolves: #1864107