diff --git a/docs/source/conf.py b/docs/source/conf.py
index 35ebbeba9..2770acac9 100644
--- a/docs/source/conf.py
+++ b/docs/source/conf.py
@@ -57,7 +57,6 @@
     "sphinxcontrib.redoc",  # generate live OpenAPI with this doc
     "sphinx.ext.autodoc",   # document code docstrings
     "sphinx.ext.autosectionlabel",  # help make cross-references to title/sections
-    "cloud_sptheme.ext.autodoc_sections",   # allow sections in docstrings code
     "sphinx.ext.githubpages",   # for publishing the doc to GitHub pages
     "sphinx.ext.todo",          # support directives
     "sphinx.ext.viewcode",      # add links to highlighted source code
diff --git a/requirements-doc.txt b/requirements-doc.txt
index 1f402ae6e..8092d5816 100644
--- a/requirements-doc.txt
+++ b/requirements-doc.txt
@@ -3,17 +3,13 @@
 # we actually need to install all requirements during docs build because of OpenAPI generation
 # (see 'docs/source/conf.py')
 -r requirements.txt
-cloud_sptheme
-jinja2<3.1  # fix sphinx failing, see: https://github.com/sphinx-doc/sphinx/issues/10291
-sphinx>=3.5,<6; python_version <= "3.7"
-# sphinx>=7 blocked by 'sphinx_rtd_theme'
-# - https://github.com/readthedocs/sphinx_rtd_theme/issues/1463
-# - https://github.com/readthedocs/sphinx_rtd_theme/pull/1464
-sphinx>=6,<7; python_version >= "3.8"
+jinja2
+sphinx>=4.0.2,<6; python_version <= "3.7"
+sphinx>=6,<8; python_version >= "3.8"
 sphinx-argparse
 sphinx-autoapi>=1.7.0
 sphinx-paramlinks>=0.4.1
 # adds redoc OpenAPI directly served on readthedocs
 sphinxcontrib-redoc>=1.6.0
 sphinx_autodoc_typehints[type_comment]>=1.19; python_version >= "3.7"
-sphinx_rtd_theme>=0.5.1
+sphinx_rtd_theme>=1.3.0,<2