diff --git a/README.md b/README.md
index 062c219..6ce2320 100644
--- a/README.md
+++ b/README.md
@@ -5,6 +5,7 @@ Robot to mirror Mastodon posts to Twitter
 ```bash
 apt install python3-mastodon 
 apt install python3-tweepy 
+apt install python3-lxml
 git clone https://git.grml.de/robin/python-matobi.git 
 ```
 If your repo for Tweepy is too old you might have to install it from git.