diff --git a/requirements.txt b/requirements.txt
index b85acd1..b633ce6 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,5 @@
 Mako==0.9.1
 MarkupSafe==0.19
-reportlab==2.7
+reportlab==3.5.55
 wsgiref==0.1.2
 pytz==2018.9