diff --git a/requirements.txt b/requirements.txt
index 3ecd8ed4e..ff149240d 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -6,6 +6,7 @@ Werkzeug>=0.8.3
 lxml>=3.2.1
 netlib>=0.9.2
 nose>=1.3.0
+mock>=1.0.1
 pathod>=0.9.2
 pyOpenSSL>=0.13
 pyasn1>=0.1.7