diff --git a/app/requirements.txt b/app/requirements.txt
index 12f5f4a..a00e161 100644
--- a/app/requirements.txt
+++ b/app/requirements.txt
@@ -1,6 +1,7 @@
 requests==2.18.4
 psycopg2-binary
 pandas
+webtest=2.0.33
 connexion==2.2.0
 Flask==0.12.2
 Werkzeug==0.14.1