diff --git a/app/auth/cas.py b/app/auth/cas.py
index 067ea350..d9b2a08f 100644
--- a/app/auth/cas.py
+++ b/app/auth/cas.py
@@ -56,11 +56,12 @@ def after_cas_logout():
     return flask.redirect(url_for("scodoc.index"))
 
 
-def set_cas_configuration(app: flask.app.Flask):
+def set_cas_configuration(app: flask.app.Flask = None):
     """Force la configuration du module flask_cas à partir des paramètres de
     la config de ScoDoc.
     Appelé au démarrage et à chaque modif des paramètres.
     """
+    app = app or current_app
     if ScoDocSiteConfig.is_cas_enabled():
         app.config["CAS_SERVER"] = ScoDocSiteConfig.get("cas_server")
         app.config["CAS_AFTER_LOGIN"] = "auth.after_cas_login"
diff --git a/app/views/scodoc.py b/app/views/scodoc.py
index 6a9c5e02..feedfd29 100644
--- a/app/views/scodoc.py
+++ b/app/views/scodoc.py
@@ -54,6 +54,7 @@ from werkzeug.exceptions import BadRequest, NotFound
 
 from app import db
 from app.auth.models import User
+from app.auth.cas import set_cas_configuration
 from app.decorators import (
     admin_required,
     scodoc7func,
@@ -149,7 +150,7 @@ def config_cas():
             flash("Serveur CAS enregistré")
         if ScoDocSiteConfig.set("cas_attribute_id", form.data["cas_attribute_id"]):
             flash("Serveur CAS enregistré")
-
+        set_cas_configuration()
         return redirect(url_for("scodoc.configuration"))
     elif request.method == "GET":
         form.cas_enable.data = ScoDocSiteConfig.get("cas_enable")