diff --git a/setup.py b/setup.py
index 936a3171..4744d0fb 100644
--- a/setup.py
+++ b/setup.py
@@ -3,7 +3,7 @@ import sys
 
 VERSION = "2.6.0" # find a better way to do so.
 
-requires = ['feedgenerator', 'jinja2', 'pygments', 'docutils', 'Markdown']
+requires = ['feedgenerator', 'jinja2', 'pygments', 'docutils', 'Markdown', 'blinker']
 if sys.version_info < (2,7):
     requires.append('argparse')