diff --git a/docs/source/conf.py b/docs/source/conf.py
index 7eb8896..915a6b5 100644
--- a/docs/source/conf.py
+++ b/docs/source/conf.py
@@ -97,13 +97,19 @@
 # The theme to use for HTML and HTML Help pages.  See the documentation for
 # a list of builtin themes.
 #
-# html_theme = 'classic'
+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
 # documentation.
 #
-# html_theme_options = {}
+html_theme_options = {
+    "repository_url": "https://github.com/AstarVienna/skycalc_ipy",
+    "use_repository_button": True,
+    "home_page_in_toc": True,
+}
+html_logo = "_static/logos/logo_skycalc_ipy_t.png"
+html_title = "skycalc_ipy"
 
 # Add any paths that contain custom static files (such as style sheets) here,
 # relative to this directory. They are copied after the builtin static files,
@@ -112,13 +118,11 @@
 
 # Custom sidebar templates, must be a dictionary that maps document names
 # to template names.
-#
-# This is required for the alabaster theme
-# refs: http://alabaster.readthedocs.io/en/latest/installation.html#sidebars
 html_sidebars = {
-    '**': [
-        'relations.html',  # needs 'show_related': True theme option to display
-        'searchbox.html',
+    "**": [
+        "navbar-logo.html",
+        "search-field.html",
+        "sbt-sidebar-nav.html",
     ]
 }
 
diff --git a/poetry.lock b/poetry.lock
index e50586f..7cce383 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -1,5 +1,19 @@
 # This file is automatically @generated by Poetry 1.7.1 and should not be changed by hand.
 
+[[package]]
+name = "accessible-pygments"
+version = "0.0.4"
+description = "A collection of accessible pygments styles"
+optional = false
+python-versions = "*"
+files = [
+    {file = "accessible-pygments-0.0.4.tar.gz", hash = "sha256:e7b57a9b15958e9601c7e9eb07a440c813283545a20973f2574a5f453d0e953e"},
+    {file = "accessible_pygments-0.0.4-py2.py3-none-any.whl", hash = "sha256:416c6d8c1ea1c5ad8701903a20fcedf953c6e720d64f33dc47bfb2d3f2fa4e8d"},
+]
+
+[package.dependencies]
+pygments = ">=1.5"
+
 [[package]]
 name = "alabaster"
 version = "0.7.13"
@@ -1724,6 +1738,33 @@ files = [
     {file = "pycparser-2.21.tar.gz", hash = "sha256:e644fdec12f7872f86c58ff790da456218b10f863970249516d60a5eaca77206"},
 ]
 
+[[package]]
+name = "pydata-sphinx-theme"
+version = "0.15.2"
+description = "Bootstrap-based Sphinx theme from the PyData community"
+optional = false
+python-versions = ">=3.9"
+files = [
+    {file = "pydata_sphinx_theme-0.15.2-py3-none-any.whl", hash = "sha256:0c5fa1fa98a9b26dae590666ff576f27e26c7ba708fee754ecb9e07359ed4588"},
+    {file = "pydata_sphinx_theme-0.15.2.tar.gz", hash = "sha256:4243fee85b3afcfae9df64f83210a04e7182e53bc3db8841ffff6d21d95ae320"},
+]
+
+[package.dependencies]
+accessible-pygments = "*"
+Babel = "*"
+beautifulsoup4 = "*"
+docutils = "!=0.17.0"
+packaging = "*"
+pygments = ">=2.7"
+sphinx = ">=5.0"
+typing-extensions = "*"
+
+[package.extras]
+a11y = ["pytest-playwright"]
+dev = ["nox", "pre-commit", "pydata-sphinx-theme[doc,test]", "pyyaml"]
+doc = ["ablog (>=0.11.0rc2)", "colorama", "ipykernel", "ipyleaflet", "jupyter_sphinx", "jupyterlite-sphinx", "linkify-it-py", "matplotlib", "myst-parser", "nbsphinx", "numpy", "numpydoc", "pandas", "plotly", "rich", "sphinx-autoapi (>=3.0.0)", "sphinx-copybutton", "sphinx-design", "sphinx-favicon (>=1.0.1)", "sphinx-sitemap", "sphinx-togglebutton", "sphinxcontrib-youtube (<1.4)", "sphinxext-rediraffe", "xarray"]
+test = ["pytest", "pytest-cov", "pytest-regressions"]
+
 [[package]]
 name = "pyerfa"
 version = "2.0.0.3"
@@ -2349,21 +2390,24 @@ lint = ["docutils-stubs", "flake8 (>=3.5.0)", "flake8-bugbear", "flake8-comprehe
 test = ["cython", "html5lib", "pytest (>=4.6)", "typed_ast"]
 
 [[package]]
-name = "sphinx-rtd-theme"
-version = "0.5.1"
-description = "Read the Docs theme for Sphinx"
+name = "sphinx-book-theme"
+version = "1.1.0"
+description = "A clean book theme for scientific explanations and documentation with Sphinx"
 optional = false
-python-versions = "*"
+python-versions = ">=3.9"
 files = [
-    {file = "sphinx_rtd_theme-0.5.1-py2.py3-none-any.whl", hash = "sha256:fa6bebd5ab9a73da8e102509a86f3fcc36dec04a0b52ea80e5a033b2aba00113"},
-    {file = "sphinx_rtd_theme-0.5.1.tar.gz", hash = "sha256:eda689eda0c7301a80cf122dad28b1861e5605cbf455558f3775e1e8200e83a5"},
+    {file = "sphinx_book_theme-1.1.0-py3-none-any.whl", hash = "sha256:088bc69d65fab8446adb8691ed61687f71bf7504c9740af68bc78cf936a26112"},
+    {file = "sphinx_book_theme-1.1.0.tar.gz", hash = "sha256:ad4f92998e53e24751ecd0978d3eb79fdaa59692f005b1b286ecdd6146ebc9c1"},
 ]
 
 [package.dependencies]
-sphinx = "*"
+pydata-sphinx-theme = ">=0.14"
+sphinx = ">=5"
 
 [package.extras]
-dev = ["bump2version", "sphinxcontrib-httpdomain", "transifex-client"]
+code-style = ["pre-commit"]
+doc = ["ablog", "folium", "ipywidgets", "matplotlib", "myst-nb", "nbclient", "numpy", "numpydoc", "pandas", "plotly", "sphinx-copybutton", "sphinx-design", "sphinx-examples", "sphinx-tabs", "sphinx-thebe", "sphinx-togglebutton", "sphinxcontrib-bibtex", "sphinxcontrib-youtube", "sphinxext-opengraph"]
+test = ["beautifulsoup4", "coverage", "myst-nb", "pytest", "pytest-cov", "pytest-regressions", "sphinx_thebe"]
 
 [[package]]
 name = "sphinxcontrib-apidoc"
@@ -2679,4 +2723,4 @@ syn = ["synphot"]
 [metadata]
 lock-version = "2.0"
 python-versions = "^3.9"
-content-hash = "93aeac8cc9787a7661b791a91e64431fb2b77d4f4294aa22194ae85825f31deb"
+content-hash = "e2705c834ab7bcb13892b9ef05fa7d0f7b956ad69c44774f9bab98f9b76e9084"
diff --git a/pyproject.toml b/pyproject.toml
index 2cc364d..89206d6 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -39,7 +39,7 @@ optional = true
 
 [tool.poetry.group.docs.dependencies]
 sphinx = "^5.3.0"
-sphinx-rtd-theme = "^0.5.1"
+sphinx-book-theme = "^1.1.0"
 jupyter-sphinx = "^0.2.3"
 sphinxcontrib-apidoc = "^0.4.0"
 nbsphinx = "^0.9.3"