diff --git a/agenda/auth.py b/agenda/auth.py
index d44696a..fc75d08 100644
--- a/agenda/auth.py
+++ b/agenda/auth.py
@@ -21,6 +21,9 @@ def verify_auth_token(token: str) -> str | None:
 
 def require_authentication() -> werkzeug.Response | None:
     """Require authentication."""
+    if not flask.current_app.config.get("REQUIRE_AUTH"):
+        return None
+
     token = flask.request.cookies.get("auth_token")
     return (
         None