diff --git a/requirements.txt b/requirements.txt
index 12ab04ecd51..047bc19d8f2 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,7 +3,7 @@ Jinja2==2.7.3
 Mako==1.0.0
 MarkupSafe==0.23
 Pillow==2.5.1
-http://download.gna.org/pychart/PyChart-1.39.tar.gz
+http://download.gna.org/pychart/PyChart-1.39.tar.gz#egg=PyChart
 PyYAML==3.11
 Werkzeug==0.9.6
 argparse==1.2.1