diff --git a/README.org b/README.org
index ce941fc..849082d 100644
--- a/README.org
+++ b/README.org
@@ -5243,7 +5243,8 @@ Available versions: 0.2.0, 0.1.1, 0.1.0
   :group 'pip
   :type '(repeat string))
 
-;; Frozen until the release of jupyterlab-4.0.0 or other packages.
+;; Frozen until a new release of jupyter-server-ydoc or other packages.
+;; See: https://github.com/conda-forge/jupyter_server_ydoc-feedstock.
 (setopt pip-frozen-packages '("aiofiles"
                               ;; "docutils"
                               "jupyter-server-ydoc"