diff --git a/requirements.txt b/requirements.txt
index 1d30f965b44556a1caa9948b8da8a1d0cbf113a2..0255be6bce4b9cdd32e87c0020af6185e0ecdb30 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,2 +1,3 @@
 lxml==3.6.4
 requests==2.12.1
+Flask==0.11.1