diff --git a/notebooks/NIRSpec/galaxy_redshift/redshift_fitting.ipynb b/notebooks/NIRSpec/galaxy_redshift/redshift_fitting.ipynb
index a69ba9c85..56b601362 100644
--- a/notebooks/NIRSpec/galaxy_redshift/redshift_fitting.ipynb
+++ b/notebooks/NIRSpec/galaxy_redshift/redshift_fitting.ipynb
@@ -1,12 +1,18 @@
 {
  "cells": [
+  {
+   "cell_type": "markdown",
+   "id": "e5f5559e-f4b3-4118-b3ec-930b787faad9",
+   "metadata": {},
+   "source": [
+    "# Redshift and Template Fitting"
+   ]
+  },
   {
    "cell_type": "markdown",
    "id": "e6c242e1",
    "metadata": {},
    "source": [
-    "# Redshift and Template Fitting\n",
-    "\n",
     "This notebook covers basic examples on how a user can measure the redshift of a source using the visualization tool [Jdaviz](https://jdaviz.readthedocs.io/en/latest/) or programmatically with [Specutils](https://specutils.readthedocs.io/en/latest/).\n",
     "\n",
     "**Use case:** measure the redshift of a galaxy from its spectrum using 2 different methods.  \n",
@@ -27,7 +33,7 @@
     "    - [Run the cross correlation function](#run_crosscorr)\n",
     "\n",
     "**Author**: Camilla Pacifici (cpacifici@stsci.edu)<br>\n",
-    "**Updated**: September 14, 2023"
+    "**Updated**: November 18, 2024"
    ]
   },
   {
@@ -174,7 +180,7 @@
     "# Select a specific directory on your machine or a temporary directory\n",
     "data_dir = tempfile.gettempdir()\n",
     "# Get the file from MAST\n",
-    "fn = \"jw02736-o007_s09239_nirspec_f170lp-g235m_x1d.fits\"\n",
+    "fn = \"jw02736-o007_s000009239_nirspec_f170lp-g235m_x1d.fits\"\n",
     "result = Observations.download_file(f\"mast:JWST/product/{fn}\", local_path=f'{data_dir}/{fn}')\n",
     "\n",
     "fn_template = download_file('https://stsci.box.com/shared/static/3rkurzwl0l79j70ddemxafhpln7ljle7.dat', cache=True)"
@@ -656,7 +662,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.9.13"
+   "version": "3.11.10"
   }
  },
  "nbformat": 4,
diff --git a/notebooks/NIRSpec/galaxy_redshift/requirements.txt b/notebooks/NIRSpec/galaxy_redshift/requirements.txt
index 0f29b127b..5bf98c8dd 100644
--- a/notebooks/NIRSpec/galaxy_redshift/requirements.txt
+++ b/notebooks/NIRSpec/galaxy_redshift/requirements.txt
@@ -1 +1 @@
-jdaviz
+jdaviz>=4.0