diff --git a/m4.spec b/m4.spec
index 865917b..ce6c063 100644
--- a/m4.spec
+++ b/m4.spec
@@ -1,13 +1,13 @@
-Summary: The GNU macro processor
+Summary: GNU macro processor
 Name: m4
 Version: 1.4.18
 Release: 16%{?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