diff --git a/.github/workflows/cache.yml b/.github/workflows/cache.yml
index 3ad063e..20b3a11 100644
--- a/.github/workflows/cache.yml
+++ b/.github/workflows/cache.yml
@@ -61,7 +61,7 @@ jobs:
           auto-update-conda: true
           auto-activate-base: true
           miniconda-version: 'latest'
-          python-version: 3.7
+          python-version: 3.8
           environment-file: environment.yml
           activate-environment: qe-lectures
       - name: Checkout QuantEcon theme
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 86d9b2c..1a26781 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -12,7 +12,7 @@ jobs:
           auto-update-conda: true
           auto-activate-base: true
           miniconda-version: 'latest'
-          python-version: 3.7
+          python-version: 3.8
           environment-file: environment.yml
           activate-environment: qe-lectures
       - name: Get Changed Files
diff --git a/.github/workflows/coverage.yml b/.github/workflows/coverage.yml
index 2932d30..6c6df3e 100644
--- a/.github/workflows/coverage.yml
+++ b/.github/workflows/coverage.yml
@@ -15,7 +15,7 @@ jobs:
           auto-update-conda: true
           auto-activate-base: true
           miniconda-version: 'latest'
-          python-version: 3.7
+          python-version: 3.8
           environment-file: environment.yml
           activate-environment: qe-lectures
       - name: Run Execution Tests
diff --git a/.github/workflows/deploy-s3.yml b/.github/workflows/deploy-s3.yml
index e992ff9..f8f91d9 100644
--- a/.github/workflows/deploy-s3.yml
+++ b/.github/workflows/deploy-s3.yml
@@ -16,7 +16,7 @@ jobs:
           auto-update-conda: true
           auto-activate-base: true
           miniconda-version: 'latest'
-          python-version: 3.7
+          python-version: 3.8
           environment-file: environment.yml
           activate-environment: qe-lectures
       - name: Checkout QuantEcon theme
diff --git a/.github/workflows/preview.yml b/.github/workflows/preview.yml
index 875c238..18b563d 100644
--- a/.github/workflows/preview.yml
+++ b/.github/workflows/preview.yml
@@ -15,7 +15,7 @@ jobs:
           auto-update-conda: true
           auto-activate-base: true
           miniconda-version: 'latest'
-          python-version: 3.7
+          python-version: 3.8
           environment-file: environment.yml
           activate-environment: qe-lectures
       - name: Get Changed Files
diff --git a/conf.py b/conf.py
index fe5be86..fbcc8f9 100644
--- a/conf.py
+++ b/conf.py
@@ -40,6 +40,7 @@
 	'IPython.sphinxext.ipython_console_highlighting',
     # Custom Sphinx Extensions
     'sphinxcontrib.jupyter', 
+    'sphinx_tomyst',
 ]
 
 # Retired Extensions but may be useful in Future
@@ -131,7 +132,7 @@
 
 # The theme to use for HTML and HTML Help pages.  See the documentation for
 # a list of builtin themes.
-html_theme = 'qe-lectures'
+html_theme = 'sphinx_book_theme'
 
 # Theme options are theme-specific and customize the look and feel of a theme
 # further.  For a list of options available for each theme, see the
@@ -139,7 +140,7 @@
 #html_theme_options = {}
 
 # Add any paths that contain custom themes here, relative to this directory.
-html_theme_path = ['_themes']
+# html_theme_path = ['_themes']
 
 # The name for this set of Sphinx documents.  If None, it defaults to
 # "<project> v<release> documentation".
@@ -367,6 +368,8 @@
 
 linkcheck_timeout = 30 
 
+# {{ tomyst-remove-start }}
+
 # --------------------------------------------
 # jupyter Sphinx Extension conversion settings
 # --------------------------------------------
@@ -477,3 +480,13 @@
 
 # pdf toc file
 jupyter_pdf_book_index = "index_toc"
+
+# tomyst Config
+
+# Set Destination path
+tomyst_static_file_path = ['source/rst/_static']
+tomyst_parser = "myst_nb"
+tomyst_conf_removeblocks = True
+tomyst_conf_dropcontaining = ["sphinxcontrib.jupyter"]
+
+# {{ tomyst-remove-finish }}
diff --git a/environment.yml b/environment.yml
index ce9a617..0ac2d01 100644
--- a/environment.yml
+++ b/environment.yml
@@ -2,11 +2,12 @@ name: qe-lectures
 channels:
   - default
 dependencies:
-  - python=3.7
-  - anaconda=2020.02
+  - python=3.8
+  - anaconda=2020.07
   - pip
   - pip:
     - interpolation
     - sphinxcontrib-jupyter
     - sphinxcontrib-bibtex
-    - joblib
\ No newline at end of file
+    - joblib
+    - git+https://github.com/executablebooks/sphinx-tomyst