diff --git a/_toc.yml b/_toc.yml
deleted file mode 100644
index 7135792b..00000000
--- a/_toc.yml
+++ /dev/null
@@ -1,61 +0,0 @@
-# Table of Contents
-#
-# Myst will respect:
-# 1. New pages
-#      - file: relative/path/to/page
-# 2. New sections without an associated page
-#      - title: Folder Title
-#        sections: ...
-# 3. New sections with an associated page
-#      - file: relative/path/to/page
-#        sections: ...
-#
-# Note: Titles defined on pages here are not recognized.
-#
-# This spec is based on the JupyterBook table of contents.
-# Learn more at https://jupyterbook.org/customize/toc.html
-
-format: jb-book
-root: index
-
-chapters:
-# GRAVITY
-- file: notebooks/gravity_index
-  sections:
-  - file: notebooks/03-gravity/fwd_gravity_anomaly_3d
-  - file: notebooks/03-gravity/fwd_gravity_gradiometry_3d
-  - file: notebooks/03-gravity/inv_gravity_anomaly_3d
-# MAGNETICS
-- file: notebooks/magnetics_index
-  sections:
-  - file: notebooks/04-magnetics/fwd_magnetics_induced_3d
-  - file: notebooks/04-magnetics/fwd_magnetics_mvi_3d
-  - file: notebooks/04-magnetics/inv_magnetics_induced_3d
-# DC RESISTIVITY
-- file: notebooks/dcr_index
-  sections:
-  - file: notebooks/05-dcr/fwd_dcr_1d
-  - file: notebooks/05-dcr/fwd_dcr_2d
-  - file: notebooks/05-dcr/fwd_dcr_3d
-  - file: notebooks/05-dcr/inv_dcr_1d
-  - file: notebooks/05-dcr/inv_dcr_2d
-  - file: notebooks/05-dcr/inv_dcr_3d
-# INDUCED POLARIZATION
-- file: notebooks/ip_index
-  sections:
-  - file: notebooks/06-ip/fwd_ip_2d
-  - file: notebooks/06-ip/fwd_ip_3d
-  - file: notebooks/06-ip/inv_ip_2d
-  - file: notebooks/06-ip/inv_ip_3d
-# FDEM
-- file: notebooks/fdem_index
-  sections:
-  - file: notebooks/07-fdem/fwd_fdem_1d
-  - file: notebooks/07-fdem/inv_fdem_1d
-# TDEM
-- file: notebooks/tdem_index
-  sections:
-  - file: notebooks/08-tdem/fwd_tdem_1d
-  - file: notebooks/08-tdem/fwd_tdem_fundamentals
-  - file: notebooks/08-tdem/fwd_utem_3d
-  - file: notebooks/08-tdem/inv_tdem_1d
diff --git a/environment.yml b/environment.yml
index b2bfc159..ba8c5000 100644
--- a/environment.yml
+++ b/environment.yml
@@ -4,7 +4,7 @@ channels:
 dependencies:
   - python=3.10.*
   # Myst requirements
-  - nodejs>=20,<21
+  - nodejs>18
   - mystmd
   # Notebook requirements
   - jupyter
diff --git a/myst.yml b/myst.yml
index 8248a604..f2601955 100644
--- a/myst.yml
+++ b/myst.yml
@@ -32,6 +32,47 @@ project:
     sphinx: https://www.sphinx-doc.org/en/master/
   exclude:
     - README.md
+    - LICENSE
+    - LICENSE-CC-BY
+    - environment.yml
+
+  toc:
+    - file: index.md
+    - file: notebooks/gravity_index.md
+      children:
+      - file: notebooks/03-gravity/fwd_gravity_anomaly_3d.ipynb
+      - file: notebooks/03-gravity/fwd_gravity_gradiometry_3d.ipynb
+      - file: notebooks/03-gravity/inv_gravity_anomaly_3d.ipynb
+    - file: notebooks/magnetics_index.md
+      children:
+      - file: notebooks/04-magnetics/fwd_magnetics_induced_3d.ipynb
+      - file: notebooks/04-magnetics/fwd_magnetics_mvi_3d.ipynb
+      - file: notebooks/04-magnetics/inv_magnetics_induced_3d.ipynb
+    - file: notebooks/dcr_index.md
+      children:
+      - file: notebooks/05-dcr/fwd_dcr_1d.ipynb
+      - file: notebooks/05-dcr/fwd_dcr_2d.ipynb
+      - file: notebooks/05-dcr/fwd_dcr_3d.ipynb
+      - file: notebooks/05-dcr/inv_dcr_1d.ipynb
+      - file: notebooks/05-dcr/inv_dcr_2d.ipynb
+      - file: notebooks/05-dcr/inv_dcr_3d.ipynb
+    - file: notebooks/ip_index.md
+      children:
+      - file: notebooks/06-ip/fwd_ip_2d.ipynb
+      - file: notebooks/06-ip/fwd_ip_3d.ipynb
+      - file: notebooks/06-ip/inv_ip_2d.ipynb
+      - file: notebooks/06-ip/inv_ip_3d.ipynb
+    - file: notebooks/fdem_index.md
+      children:
+      - file: notebooks/07-fdem/fwd_fdem_1d.ipynb
+      - file: notebooks/07-fdem/inv_fdem_1d.ipynb
+    - file: notebooks/tdem_index.md
+      children:
+      - file: notebooks/08-tdem/fwd_tdem_1d.ipynb
+      - file: notebooks/08-tdem/fwd_tdem_fundamentals.ipynb
+      - file: notebooks/08-tdem/fwd_utem_3d.ipynb
+      - file: notebooks/08-tdem/inv_tdem_1d.ipynb
+
 site:
   template: book-theme
   title: SimPEG User Tutorials