diff --git a/install/requirements.txt b/install/requirements.txt
index e6e9793..a62000e 100644
--- a/install/requirements.txt
+++ b/install/requirements.txt
@@ -14,7 +14,8 @@ django-test-without-migrations==0.6
 #gunicorn==19.8.1
 iso8601==0.1.12
 jdcal==1.4
-lxml==4.3.0
+#lxml==4.3.0
+lxml==4.5.1
 mysqlclient==1.3.12
 #pluggy>=0.7
 pluggy==0.8.1
@@ -39,6 +40,8 @@ httplib2
 dataclasses
 pykwalify
 PyYAML
+matplotlib
+numpy
 # For Celery:
 ##celery==3.1.23
 ##flower==0.9.2
--
libgit2 0.21.2