diff --git a/requirements.txt b/requirements.txt
index dffc2545b5462dec519efa5c715eb73f93b894e4..ccc3b6984075fa7935cae59e9aa90aa168f5ea3f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -14,5 +14,6 @@ lxml
 gitpython
 karabo_data
 sklearn
+prettytable
 ./cal_tools
 .