diff --git a/web/pip-requirements.txt b/web/pip-requirements.txt
index c140981..1840126 100644
--- a/web/pip-requirements.txt
+++ b/web/pip-requirements.txt
@@ -25,3 +25,4 @@ pytz==2014.10
 requests==2.5.1
 sqltap==0.3.5
 wsgiref==0.1.2
+prometheus-client==0.1.1