diff --git a/.github/workflows/cache.yml b/.github/workflows/cache.yml
index 26ed9d2..be24fce 100644
--- a/.github/workflows/cache.yml
+++ b/.github/workflows/cache.yml
@@ -8,7 +8,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: iterative/setup-cml@v1
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           ref: ${{ github.event.pull_request.head.sha }}
       - name: Deploy runner on EC2
@@ -30,7 +30,7 @@ jobs:
       image: docker://mmcky/quantecon-lecture-python:cuda-12.1.0-anaconda-2023-09-py311-c
       options: --gpus all
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           ref: ${{ github.event.pull_request.head.sha }}
       - name: Check nvidia drivers
@@ -42,13 +42,13 @@ jobs:
         run: |
           jb build lectures --path-output ./ -W --keep-going
       - name: Upload Execution Reports
-        uses: actions/upload-artifact@v2
+        uses: actions/upload-artifact@v4
         if: failure()
         with:
           name: execution-reports
           path: _build/html/reports
       - name: Upload "_build" folder (cache)
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: build-cache
           path: _build
\ No newline at end of file
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index eef986f..2354c6e 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -5,7 +5,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: iterative/setup-cml@v1
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           ref: ${{ github.event.pull_request.head.sha }}
       - name: Deploy runner on EC2
@@ -27,7 +27,7 @@ jobs:
       image: docker://mmcky/quantecon-lecture-python:cuda-12.1.0-anaconda-2023-09-py311-c
       options: --gpus all
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           ref: ${{ github.event.pull_request.head.sha }}
       # Check nvidia drivers
@@ -55,7 +55,7 @@ jobs:
           mkdir -p _build/html/_notebooks
           cp -u _build/jupyter/*.ipynb _build/html/_notebooks
       - name: Upload Execution Reports (Download Notebooks)
-        uses: actions/upload-artifact@v2
+        uses: actions/upload-artifact@v4
         if: failure()
         with:
           name: execution-reports
@@ -67,7 +67,7 @@ jobs:
           mkdir -p _build/html/_pdf
           cp -u _build/latex/*.pdf _build/html/_pdf
       - name: Upload Execution Reports (LaTeX)
-        uses: actions/upload-artifact@v2
+        uses: actions/upload-artifact@v4
         if: failure()
         with:
           name: execution-reports
@@ -78,13 +78,13 @@ jobs:
         run: |
           jb build lectures --path-output ./ -n -W --keep-going
       - name: Upload Execution Reports (HTML)
-        uses: actions/upload-artifact@v2
+        uses: actions/upload-artifact@v4
         if: failure()
         with:
           name: execution-reports
           path: _build/html/reports
       - name: Preview Deploy to Netlify
-        uses: nwtgck/actions-netlify@v1.1
+        uses: nwtgck/actions-netlify@v2
         with:
           publish-dir: '_build/html/'
           production-branch: main
diff --git a/.github/workflows/linkcheck.yml b/.github/workflows/linkcheck.yml
index bf5dd35..00c886a 100644
--- a/.github/workflows/linkcheck.yml
+++ b/.github/workflows/linkcheck.yml
@@ -16,7 +16,7 @@ jobs:
         python-version: ["3.11"]
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
       - name: Setup Anaconda
         uses: conda-incubator/setup-miniconda@v2
         with:
@@ -27,7 +27,7 @@ jobs:
           environment-file: environment.yml
           activate-environment: quantecon
       - name: Download "build" folder (cache)
-        uses: dawidd6/action-download-artifact@v2
+        uses: dawidd6/action-download-artifact@v3
         with:
           workflow: cache.yml
           branch: main
@@ -37,7 +37,7 @@ jobs:
         shell: bash -l {0}
         run: jb build lectures --path-output=./ --builder=custom --custom-builder=linkcheck
       - name: Upload Link Checker Reports
-        uses: actions/upload-artifact@v2
+        uses: actions/upload-artifact@v4
         if: failure()
         with:
           name: linkcheck-reports
diff --git a/.github/workflows/publish.yml b/.github/workflows/publish.yml
index f139e2c..691dc1b 100644
--- a/.github/workflows/publish.yml
+++ b/.github/workflows/publish.yml
@@ -8,7 +8,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: iterative/setup-cml@v1
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           ref: ${{ github.event.pull_request.head.sha }}
       - name: Deploy runner on EC2
@@ -32,7 +32,7 @@ jobs:
       options: --gpus all
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Install Git (required to commit notebooks)
         shell: bash -l {0}
         run: apt-get install -y git
@@ -48,7 +48,7 @@ jobs:
         run: pip list
       # Download Build Cache from cache.yml
       - name: Download "build" folder (cache)
-        uses: dawidd6/action-download-artifact@v2
+        uses: dawidd6/action-download-artifact@v3
         with:
           workflow: cache.yml
           branch: main
@@ -88,7 +88,7 @@ jobs:
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}
           publish_dir: _build/html/
-          cname: stats.quantecon.org
+          # cname: stats.quantecon.org
       - name: Prepare lecture-stats.notebooks sync
         shell: bash -l {0}
         run: |
diff --git a/lectures/_config.ymla b/lectures/_config.ymla
deleted file mode 100644
index a400128..0000000
--- a/lectures/_config.ymla
+++ /dev/null
@@ -1,121 +0,0 @@
-title: Statistics for Computational Economics
-author: Thomas J. Sargent & John Stachurski
-logo: _static/qe-logo-large.png
-description: This website presents a set of lectures on advanced quantitative economic modeling, designed and written by Thomas J. Sargent and John Stachurski.
-
-parse:
-  myst_enable_extensions:
-    - amsmath
-    - colon_fence
-    - deflist
-    - dollarmath
-    - html_admonition
-    - html_image
-    - linkify
-    - replacements
-    - smartquotes
-    - substitution
-
-execute:
-  execute_notebooks: "cache"
-  timeout: 7200   # 2 Hours
-
-bibtex_bibfiles:
-   - _static/quant-econ.bib
-
-html:
-  baseurl: https://python-advanced.quantecon.org/
-
-latex:
-   latex_documents:
-      targetname: quantecon-python-advanced.tex
-
-sphinx:
-  extra_extensions: [sphinx_multitoc_numbering, sphinxext.rediraffe, sphinx_tojupyter, sphinx_exercise, sphinx_togglebutton]
-  config:
-    nb_mime_priority_overrides: [
-       # HTML
-       ['html', 'application/vnd.jupyter.widget-view+json', 10],
-       ['html', 'application/javascript', 20],
-       ['html', 'text/html', 30],
-       ['html', 'text/latex', 40],
-       ['html', 'image/svg+xml', 50],
-       ['html', 'image/png', 60],
-       ['html', 'image/jpeg', 70],
-       ['html', 'text/markdown', 80],
-       ['html', 'text/plain', 90],
-       # Jupyter Notebooks
-       ['jupyter', 'application/vnd.jupyter.widget-view+json', 10],
-       ['jupyter', 'application/javascript', 20],
-       ['jupyter', 'text/html', 30],
-       ['jupyter', 'text/latex', 40],
-       ['jupyter', 'image/svg+xml', 50],
-       ['jupyter', 'image/png', 60],
-       ['jupyter', 'image/jpeg', 70],
-       ['jupyter', 'text/markdown', 80],
-       ['jupyter', 'text/plain', 90],
-       # LaTeX
-       ['latex', 'text/latex', 10],
-       ['latex', 'application/pdf', 20],
-       ['latex', 'image/png', 30],
-       ['latex', 'image/jpeg', 40],
-       ['latex', 'text/markdown', 50],
-       ['latex', 'text/plain', 60],
-       ['latex', 'text/html', 70],
-       # Link Checker
-       ['linkcheck', 'text/plain', 10],
-     ]
-    html_favicon: _static/lectures-favicon.ico
-    html_theme: quantecon_book_theme
-    html_static_path: ['_static']
-    html_theme_options:
-      header_organisation_url: https://quantecon.org
-      header_organisation: QuantEcon
-      repository_url: https://github.com/QuantEcon/lecture-python-advanced.myst
-      nb_repository_url: https://github.com/QuantEcon/lecture-python-advanced.notebooks
-      twitter: quantecon
-      twitter_logo_url: https://assets.quantecon.org/img/qe-twitter-logo.png
-      og_logo_url: https://assets.quantecon.org/img/qe-og-logo.png
-      description: This website presents a set of lectures on advanced quantitative economic modeling, designed and written by Thomas J. Sargent and John Stachurski.
-      keywords: Python, QuantEcon, Quantitative Economics, Economics, Sloan, Alfred P. Sloan Foundation, Tom J. Sargent, John Stachurski
-      analytics:
-        google_analytics_id: G-KZLV7PM9LL
-      launch_buttons:
-        colab_url             : https://colab.research.google.com
-    mathjax3_config:
-      tex:
-        macros:
-          "argmax": "arg\\,max"
-          "argmin": "arg\\,min"
-          "col": "col"
-          "Span":  "span"
-          "epsilon": "\\varepsilon"
-          "EE": "\\mathbb{E}"
-          "PP": "\\mathbb{P}"
-          "RR": "\\mathbb{R}"
-          "NN": "\\mathbb{N}"
-          "ZZ": "\\mathbb{Z}"
-          "aA": "\\mathcal{A}"
-          "bB": "\\mathcal{B}"
-          "cC": "\\mathcal{C}"
-          "dD": "\\mathcal{D}"
-          "eE": "\\mathcal{E}"
-          "fF": "\\mathcal{F}"
-          "gG": "\\mathcal{G}"
-          "hH": "\\mathcal{H}"
-    mathjax_path: https://cdn.jsdelivr.net/npm/mathjax@3/es5/tex-mml-chtml.js
-    rediraffe_redirects:
-      index_toc.md: intro.md
-    tojupyter_static_file_path: ["source/_static", "_static"]
-    tojupyter_target_html: true
-    tojupyter_urlpath: "https://python-advanced.quantecon.org/"
-    tojupyter_image_urlpath: "https://python-advanced.quantecon.org/_static/"
-    tojupyter_lang_synonyms: ["ipython", "ipython3", "python"]
-    tojupyter_kernels:
-      python3:
-        kernelspec:
-          display_name: "Python"
-          language: python3
-          name: python3
-        file_extension: ".py"
-    tojupyter_images_markdown: true