--- a/mumble.rst	Wed Dec 19 15:54:27 2018 +0200
+++ b/mumble.rst	Thu Dec 20 23:05:33 2018 +0200
@@ -16,5 +16,7 @@
   Setting Up a Murmur Server.
 https://wiki.mumble.info/wiki/FAQ/English
   FAQ.
+https://wiki.mumble.info/wiki/Obtaining_a_Let%27s_Encrypt_Murmur_Certificate
+  Obtaining a Let's Encrypt Murmur Certificate.
 https://www.digitalocean.com/community/tutorials/how-to-install-and-configure-mumble-server-murmur-on-ubuntu-14-04
   How To Install and Configure Mumble Server (Murmur) on Ubuntu 14.04