diff --git a/requirements.txt b/requirements.txt
index d92bfe4..457e760 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -12,7 +12,7 @@ Pygments==2.1.3
 pyparsing==2.1.10
 python-dateutil==2.6.0
 pytz==2016.10
-reportlab==3.3.0
+reportlab==3.5.55
 requests==2.12.3
 scipy>=0.18.1
 six==1.10.0