diff --git a/requirements.txt b/requirements.txt
index b6b89261e..372c85ffe 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,4 +2,5 @@ icalendar==4.0.2
 Markdown==2.6.11
 pelican==3.7.1
 beautifulsoup4==4.6.3
-html5lib==1.0.1
\ No newline at end of file
+html5lib==1.0.1
+Pillow==6.1.0