diff --git a/doc/requirements.txt b/doc/requirements.txt
index 74c434357..4bb33443a 100644
--- a/doc/requirements.txt
+++ b/doc/requirements.txt
@@ -3,3 +3,6 @@ mock
 guzzle_sphinx_theme
 breathe
 sh>=1.12.14
+matplotlib>=2.1
+graphviz
+numpy