diff --git a/src/m3ua_codec.erl b/src/m3ua_codec.erl
index 5b29b7e..5855a41 100644
--- a/src/m3ua_codec.erl
+++ b/src/m3ua_codec.erl
@@ -1,4 +1,4 @@
-% M3UA in accordance with RFC4666 (http://tools.ietf.org/html/rfc4666)
+% M3UA in accordance with RFC4666 (https://tools.ietf.org/html/rfc4666)
 
 % (C) 2011 by Harald Welte <laforge@gnumonks.org>
 %
@@ -15,15 +15,15 @@
 % GNU General Public License for more details.
 %
 % You should have received a copy of the GNU Affero General Public License
-% along with this program.  If not, see <http://www.gnu.org/licenses/>.
+% along with this program.  If not, see <https://www.gnu.org/licenses/>.
 %
 % Additional Permission under GNU AGPL version 3 section 7:
 %
 % If you modify this Program, or any covered work, by linking or
 % combining it with runtime libraries of Erlang/OTP as released by
-% Ericsson on http://www.erlang.org (or a modified version of these
+% Ericsson on https://www.erlang.org (or a modified version of these
 % libraries), containing parts covered by the terms of the Erlang Public
-% License (http://www.erlang.org/EPLICENSE), the licensors of this
+% License (https://www.erlang.org/EPLICENSE), the licensors of this
 % Program grant you additional permission to convey the resulting work
 % without the need to license the runtime libraries of Erlang/OTP under
 % the GNU Affero General Public License. Corresponding Source for a