diff --git a/TreeViz/requirements.txt b/TreeViz/requirements.txt
index e82c1c7..1ff6517 100644
--- a/TreeViz/requirements.txt
+++ b/TreeViz/requirements.txt
@@ -88,7 +88,7 @@ pytz==2015.4
 pyxdg==0.25
 pyzmq==14.7.0
 qtconsole==4.0.1
-reportlab==3.0
+reportlab==3.5.55
 requests==2.7.0
 rsa==3.1.4
 scikit-learn==0.14.1