diff --git a/misp-zmq/README.md b/misp-zmq/README.md
index 3d122eb..bab642b 100644
--- a/misp-zmq/README.md
+++ b/misp-zmq/README.md
@@ -32,6 +32,13 @@ Prior to enabling it, make sure that you have the pyzmq installed by running
 
 ~~~~
 sudo pip install pyzmq
+sudo pip install redis
+~~~~
+
+If you have problems and the plugin does not start, the logfile may be helpful.
+
+~~~~
+sudo cat /var/www/MISP/app/tmp/logs/mispzmq.error.log 
 ~~~~
 
 ![ZeroMQ configuration](./figures/zmq-config.png)