diff --git a/Doc/docs-requirements.txt b/Doc/docs-requirements.txt
index c142c9656..9170d92ad 100644
--- a/Doc/docs-requirements.txt
+++ b/Doc/docs-requirements.txt
@@ -1,2 +1,3 @@
 sphinx == 3.0.2
 sphinx_rtd_theme == 0.4.3
+reportlab == 3.5.42