note that we'll be relying on the cryptography lib, 2.0 or newer
diff --git a/docs/source/setup.rst b/docs/source/setup.rst
index 449fdc1..ca6b63d 100644
--- a/docs/source/setup.rst
+++ b/docs/source/setup.rst
@@ -96,6 +96,7 @@
 - - certifi
 - - sqlite3
 - - bcrypt
+- - cryptography >= 2.0.0
 - Gunicorn for Python 3.x (often called gunicorn3) or mod_wsgi
 
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