diff --git a/README.md b/README.md
index 3bd5d7a..d4fe07b 100644
--- a/README.md
+++ b/README.md
@@ -90,6 +90,15 @@ The base for building games is:
 * Flask   - web frontend
 * etcd    - storing data, games, etcd.
 
+## Requirements
+
+Tested packages @ Ubuntu 18.04.3
+
+* etcd
+* python3-etcd
+* python3-flask
+* python3-flask-restful
+
 ## Things to solve
 
 * Enhance the Challenge class - maybe make it easier for challenges to abort