diff --git a/src/bin/shipyard_airflow/requirements.txt b/src/bin/shipyard_airflow/requirements.txt
index 2394425b..404fdf37 100644
--- a/src/bin/shipyard_airflow/requirements.txt
+++ b/src/bin/shipyard_airflow/requirements.txt
@@ -17,6 +17,7 @@
 alembic==0.9.5
 arrow==0.10.0
 configparser==3.5.0
+cryptography==2.3
 falcon==1.2.0
 jsonschema==2.6.0
 keystoneauth1==3.4.0