diff --git a/.readthedocs.yml b/.readthedocs.yml
index 164fb2f..dcb4c93 100644
--- a/.readthedocs.yml
+++ b/.readthedocs.yml
@@ -1,14 +1,27 @@
-# .readthedocs.yml
-# Read the Docs configuration file
+# Read the Docs configuration file for Sphinx projects
 # See https://docs.readthedocs.io/en/stable/config-file/v2.html for details
+
+# Required
 version: 2
 
-# Build from the docs/ directory with Sphinx
+# Set the OS, Python version and other tools you might need
+build:
+  os: ubuntu-22.04
+  tools:
+    python: "3.12"
+
+# Build documentation in the "docs/" directory with Sphinx
 sphinx:
   configuration: docs/source/conf.py
 
-# Explicitly set the version of Python and its requirements
+# Optionally build your docs in additional formats such as PDF and ePub
+# formats:
+#   - pdf
+#   - epub
+
+# Optional but recommended, declare the Python requirements required
+# to build your documentation
+# See https://docs.readthedocs.io/en/stable/guides/reproducible-builds.html
 python:
-  version: 3.7
   install:
-    - requirements: docs/source/requirements.txt
\ No newline at end of file
+    - requirements: docs/requirements.txt
diff --git a/docs/source/requirements.txt b/docs/requirements.txt
similarity index 81%
rename from docs/source/requirements.txt
rename to docs/requirements.txt
index 4f3792d..a80a220 100644
--- a/docs/source/requirements.txt
+++ b/docs/requirements.txt
@@ -10,4 +10,6 @@ pylint
 pytest
 lvm_read
 matplotlib>=3.3
-pyExSi
\ No newline at end of file
+pyExSi
+sphinx-book-theme
+sphinx-copybutton
\ No newline at end of file
diff --git a/docs/source/conf.py b/docs/source/conf.py
index 20b4680..40325c2 100644
--- a/docs/source/conf.py
+++ b/docs/source/conf.py
@@ -58,8 +58,7 @@
 # The suffix(es) of source filenames.
 # You can specify multiple suffix as a list of string:
 #
-# source_suffix = ['.rst', '.md']
-source_suffix = '.rst'
+source_suffix = {'.rst': 'restructuredtext'}
 
 # The master toctree document.
 master_doc = 'index'
@@ -69,7 +68,7 @@
 #
 # This is also used if you do content translation via gettext catalogs.
 # Usually you set "language" from the command line for these cases.
-language = None
+language = "en"
 
 # List of patterns, relative to source directory, that match files and
 # directories to ignore when looking for source files.
@@ -85,7 +84,7 @@
 # The theme to use for HTML and HTML Help pages.  See the documentation for
 # a list of builtin themes.
 #
-html_theme = 'sphinx_rtd_theme'
+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