diff --git a/docs/conf.py b/docs/conf.py
index ce3dca0..9579e9b 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -56,7 +56,6 @@
     "sphinx_issues",
     "sphinxcontrib.bibtex",
     "sphinx_autodoc_typehints",
-    "sphinx_tabs.tabs",
     "sphinx.ext.mathjax",
     "IPython.sphinxext.ipython_console_highlighting",
     "sphinxext.opengraph",
diff --git a/pyproject.toml b/pyproject.toml
index a68619f..6001624 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -23,12 +23,11 @@ optional-dependencies.docs = [
   "ipykernel",
   "ipython",
   "myst-nb>=1.1",
-  "sphinx>=7",
+  "sphinx>=9",
   "sphinx-autodoc-typehints",
   "sphinx-book-theme>=1.1",
   "sphinx-copybutton",
   "sphinx-issues>=5.0.1",
-  "sphinx-tabs",
   "sphinxcontrib-bibtex>=1",
   "sphinxext-opengraph",
 ]