diff --git a/webapp/requirements.txt b/webapp/requirements.txt
index 402aba3..1c9a4e6 100644
--- a/webapp/requirements.txt
+++ b/webapp/requirements.txt
@@ -3,3 +3,4 @@ flask-sqlalchemy
 flask_limiter
 requests_oauthlib
 Flask-SSLify
+paypalrestsdk