diff --git a/Running-Mastodon/Production-guide.md b/Running-Mastodon/Production-guide.md
index c661f272..b9b95c27 100644
--- a/Running-Mastodon/Production-guide.md
+++ b/Running-Mastodon/Production-guide.md
@@ -48,6 +48,16 @@ The records added are:
 
 All dependencies should be installed as root.
 
+## Extend Ubuntu repositories when using Ubuntu 18.04.1 LTS
+
+Starting with .1-release Ubuntu 18.04.1 LTS (not 18.04), Canonical has removed the multiverse, universe and restricted repository from the sources.list file in /etc/apt/. It is now necessary to add those repositories, otherwise the installation of the following dependencies will fail. Simply run the following commands:
+
+```add-apt-repository universe
+add-apt-repository multiverse
+add-apt-repository restricted
+apt update
+```
+
 ### node.js Repository
 
 You will need to add an external repository so we can have the version of [node.js](https://nodejs.org/en/) required.