From fb3ec89ea2c1fdf7cca8a1ce57ebac8226e247f9 Mon Sep 17 00:00:00 2001
From: Zach Sailer <zsailer@apple.com>
Date: Thu, 11 Nov 2021 09:37:07 -0800
Subject: [PATCH] update jpserver-extensions trait to work with traitlets 5.x

---
 jupyter_server/serverapp.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/jupyter_server/serverapp.py b/jupyter_server/serverapp.py
index 54c169eed9..1dd6f9ba0a 100644
--- a/jupyter_server/serverapp.py
+++ b/jupyter_server/serverapp.py
@@ -1590,7 +1590,8 @@ def _update_server_extensions(self, change):
         self.server_extensions = change["new"]
 
     jpserver_extensions = Dict(
-        {},
+        default_value={},
+        value_trait=Bool(),
         config=True,
         help=(
             _i18n(