diff --git a/authn-service/requirements.txt b/authn-service/requirements.txt
index 96f4ca2..c89dbd1 100644
--- a/authn-service/requirements.txt
+++ b/authn-service/requirements.txt
@@ -23,3 +23,4 @@ SecretStorage==2.3.1
 six==1.12.0
 urllib3==1.25.11
 Werkzeug==1.0.1
+django-piston==0.2.0