diff --git a/doc/dashboard.rst b/doc/dashboard.rst
index f0d19e17..e355c4ec 100644
--- a/doc/dashboard.rst
+++ b/doc/dashboard.rst
@@ -6,7 +6,7 @@ Dashboard Overview
 
 A dashboard is available at route ``/dashboard``. The dashboard can be enabled
 by setting :ref:`settings-enable-dashboard` to ``True``, and by setting a
-:ref:`settings-login-username` and :ref:`settings-login-pw`.
+:ref:`settings-login-username`, :ref:`settings-login-pw`, and :ref:`settings-secret-key`.
 
 
 
diff --git a/doc/settings.rst b/doc/settings.rst
index d541382d..fdb13f53 100644
--- a/doc/settings.rst
+++ b/doc/settings.rst
@@ -583,6 +583,8 @@ Whether to enable the dashbaord. If True, then the ``login_username`` and
 :Type: ``bool``
 :Default: False
 
+.. seealso:: :ref:`dashboard-overview`
+
 
 .. _settings-do-scheduler:
 
@@ -629,6 +631,24 @@ web pages urls/routes. By default if you aren't
 using them, this is ignored.
 
 
+.. _settings-secret-key:
+
+secret_key
+~~~~~~~~~~
+
+:Type: ``string``
+:Default: None
+
+This is `required by psiTurk's underlying Flask server`__ for any route
+that uses a "Session", such as the :ref:`psiTurk Dashboard <dashboard-overview>`.
+
+It can be any string.
+
+__ https://flask.palletsprojects.com/en/1.1.x/quickstart/#sessions
+
+.. seealso:: :ref:`dashboard-overview`
+
+
 .. _settings-threads:
 
 threads