diff --git a/gtkmm30.spec b/gtkmm30.spec
index 4978b73..f9eea2d 100644
--- a/gtkmm30.spec
+++ b/gtkmm30.spec
@@ -15,8 +15,8 @@ Release:        1%{?dist}
 Summary:        C++ interface for the GTK+ library
 
 License:        LGPLv2+
-URL:            http://www.gtkmm.org/
-Source0:        http://download.gnome.org/sources/gtkmm/%{release_version}/gtkmm-%{version}.tar.xz
+URL:            https://www.gtkmm.org/
+Source0:        https://download.gnome.org/sources/gtkmm/%{release_version}/gtkmm-%{version}.tar.xz
 
 BuildRequires:  gcc-c++
 BuildRequires:  atkmm-devel >= %{atkmm_version}
@@ -112,6 +112,7 @@ find $RPM_BUILD_ROOT -name '*.la' -exec rm -f {} ';'
 %changelog
 * Mon Dec 14 2020 Kalev Lember <klember@redhat.com> - 3.24.3-1
 - Update to 3.24.3
+- Use https source URLs
 
 * Sat Nov 21 2020 Andrew Potter <agpotter@gmail.com> - 3.24.2-4
 - Opt-out of LTO (#1898054)