diff --git a/.github/workflows/documentation_release.yml b/.github/workflows/documentation_release.yml
new file mode 100644
index 00000000..2b08ab63
--- /dev/null
+++ b/.github/workflows/documentation_release.yml
@@ -0,0 +1,49 @@
+name: documentation update
+
+on:
+  push:
+    tags:
+      - '*'
+
+permissions:
+  contents: write
+
+jobs:
+  testing:
+    name: Documentation
+    runs-on: "ubuntu-latest"
+    defaults:
+      run:
+        shell: bash -el {0}
+    strategy:
+      matrix:
+        python-version: ["3.11"]
+    steps:
+      - name: checkout actions
+        uses: actions/checkout@v4
+      - uses: conda-incubator/setup-miniconda@v3
+        with:
+          auto-update-conda: true
+          python-version: ${{ matrix.python-version }}
+          channels: conda-forge
+
+      - name: install dependencies
+        run: conda install -c conda-forge freecad -y
+
+      - name: install package
+        run: |
+          pip install --upgrade pip
+          pip install .[docs]
+      - name: Sphinx build
+        run: |
+          sphinx-build docs _build
+          cp _build _build/${{  github.ref_name }}
+      - name: Deploy to GitHub Pages
+        if: github.event_name == 'push'
+        uses: peaceiris/actions-gh-pages@v4
+        with:
+          publish_branch: gh-pages
+          github_token: ${{ secrets.GITHUB_TOKEN }}
+          publish_dir: _build/
+          # force_orphan: true https://github.com/peaceiris/actions-gh-pages/issues/455
+          keep_files: true
diff --git a/.github/workflows/documentation.yml b/.github/workflows/documentation_update_dev.yml
similarity index 82%
rename from .github/workflows/documentation.yml
rename to .github/workflows/documentation_update_dev.yml
index 41934563..8bb539c9 100644
--- a/.github/workflows/documentation.yml
+++ b/.github/workflows/documentation_update_dev.yml
@@ -1,4 +1,4 @@
-name: documentation
+name: documentation update dev
 
 on:
   pull_request:
@@ -41,12 +41,13 @@ jobs:
           pip install .[docs]
       - name: Sphinx build
         run: |
-          sphinx-build docs _build
+          sphinx-build docs _build/dev
       - name: Deploy to GitHub Pages
         if: github.event_name == 'push'
         uses: peaceiris/actions-gh-pages@v4
         with:
           publish_branch: gh-pages
           github_token: ${{ secrets.GITHUB_TOKEN }}
-          publish_dir: _build/
-          force_orphan: true
+          publish_dir: _build/dev
+          # force_orphan: true https://github.com/peaceiris/actions-gh-pages/issues/455
+          keep_files: true
\ No newline at end of file
diff --git a/docs/conf.py b/docs/conf.py
index 4af84bb2..e8569265 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -11,6 +11,7 @@
 # documentation root, use os.path.abspath to make it absolute, like shown here.
 #
 import os
+import re
 import sys
 
 sys.path.insert(0, os.path.abspath("../../src"))
@@ -22,7 +23,12 @@
 author = "Juan-Pablo Catalan and Patrick Sauvan"
 
 # The full version, including alpha/beta/rc tags
-release = "1.0.1"
+# import geouned
+version='1.1.0'
+# version = geouned.__version__
+# # The full version, including alpha/beta/rc tags.
+# release = geouned.__version__
+
 
 
 # -- General configuration ---------------------------------------------------
@@ -51,17 +57,35 @@
 
 # -- Options for HTML output -------------------------------------------------
 
-# The theme to use for HTML and HTML Help pages.  See the documentation for
-# a list of builtin themes.
-#
-html_theme = "sphinx_rtd_theme"
+# The theme to use for HTML and HTML Help pages.
+# this theme supports versions https://github.com/pydata/pydata-sphinx-theme
+html_theme = "pydata_sphinx_theme"
 
 # 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,
 # so a file named "default.css" will overwrite the builtin "default.css".
 html_static_path = ["_static"]
 
-html_context = {
-    "display_github": True,
-}
+# html_context = {
+#     "display_github": True,
+# }
 # html_favicon = "favicon.ico"
+
+# Version match must match the 'version' key in version_swticher.json
+pattern = re.compile(r'^[0-9]+\.[0-9]+')
+version_match = pattern.search(version)
+if version_match:
+    version_match = version_match.group() + ".x"
+elif 'dev' in version:
+    version_match = "dev"
+else:
+    version_match = version
+
+html_theme_options = {
+    'switcher': {
+            'json_url': 'https://raw.githubusercontent.com/fusion-neutronics/GEOUNED/adding_version_support_to_docs/docs/version_switcher.json',
+            'version_match': '1.1.0',
+        },
+    'nav_title': 'Geouned',
+    'navbar_start': ['version-switcher', 'navbar-icon-links'],
+}
\ No newline at end of file
diff --git a/docs/version_switcher.json b/docs/version_switcher.json
new file mode 100644
index 00000000..5b38419d
--- /dev/null
+++ b/docs/version_switcher.json
@@ -0,0 +1,11 @@
+[
+    {
+        "name": "1.1.0 (stable)",
+        "version": "1.1.0",
+        "url": "https://geouned-org.github.io/GEOUNED/stable"
+    },
+    {
+        "version": "1.0.1",
+        "url": "https://geouned-org.github.io/GEOUNED/1.0.1"
+    }
+]
\ No newline at end of file
diff --git a/pyproject.toml b/pyproject.toml
index ea4bbfd9..f8fcb9f1 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -43,9 +43,8 @@ tests = [
 ]
 docs = [
   "sphinx",
-  "sphinx_rtd_theme",
+  "pydata-sphinx-theme",
   "sphinx_autodoc_typehints",
-  "sphinx_rtd_theme",
 ]
 
 [project.scripts]