diff --git a/requirements.txt b/requirements.txt
index cb43aed9..1a660484 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -11,3 +11,5 @@ html2text>=2019.8.11
 future>=0.18.2
 XlsxWriter>=1.2.8
 faraday-plugins>=1.2.0,<2.0.0
+pycairo>=1.18.1
+cairocffi>=0.9.0