diff --git a/requirements.txt b/requirements.txt
index 1dbf927199..64596a8fc5 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,5 @@
-docutils==0.20.1
-Sphinx==7.2.6
-sphinx-rtd-theme==2.0.0
+docutils==0.21.2
+Sphinx==8.2.3
+sphinx-rtd-theme==3.0.2
 readthedocs-sphinx-ext==2.2.5
-Jinja2==3.1.5
+Jinja2==3.1.6
diff --git a/source/conf.py b/source/conf.py
index fe4543b671..1d22e37a58 100644
--- a/source/conf.py
+++ b/source/conf.py
@@ -41,9 +41,6 @@
 # extensions coming with Sphinx (named 'sphinx.ext.*') or your custom
 # ones.
 extensions = [
-    'sphinx.ext.autodoc',
-    'sphinx.ext.doctest',
-    'sphinx.ext.intersphinx',
     'sphinx.ext.todo',
     'sphinx.ext.autosectionlabel',
 ]
@@ -186,11 +183,6 @@
 
 # -- Extension configuration -------------------------------------------------
 
-# -- Options for intersphinx extension ---------------------------------------
-
-# Example configuration for intersphinx: refer to the Python standard library.
-intersphinx_mapping = {'https://docs.python.org/': None}
-
 # -- Options for todo extension ----------------------------------------------
 
 # If true, `todo` and `todoList` produce output, else they produce nothing.