diff --git a/changelog/14303.doc.rst b/changelog/14303.doc.rst
new file mode 100644
index 00000000000..377c6d6057b
--- /dev/null
+++ b/changelog/14303.doc.rst
@@ -0,0 +1 @@
+The documentation is now built with Sphinx >= 9.
diff --git a/doc/en/conf.py b/doc/en/conf.py
index 81156493131..39cd169cdb3 100644
--- a/doc/en/conf.py
+++ b/doc/en/conf.py
@@ -89,6 +89,8 @@
     ("py:class", "_pytest.python_api.RaisesContext"),
     ("py:class", "_pytest.recwarn.WarningsChecker"),
     ("py:class", "_pytest.reports.BaseReport"),
+    # Sphinx bugs(?)
+    ("py:class", "RewriteHook"),
     # Undocumented third parties
     ("py:class", "_tracing.TagTracerSub"),
     ("py:class", "warnings.WarningMessage"),
diff --git a/doc/en/requirements.txt b/doc/en/requirements.txt
index d672a9d7e15..ecaf889cd9e 100644
--- a/doc/en/requirements.txt
+++ b/doc/en/requirements.txt
@@ -2,9 +2,8 @@
 pluggy>=1.5.0
 pygments-pytest>=2.5.0
 sphinx-removed-in>=0.2.0
-# Pinning to <9.0 due to https://github.com/python-trio/sphinxcontrib-trio/issues/399.
-sphinx>=7,<9.0
-sphinxcontrib-trio
+sphinx>=9
+sphinxcontrib-trio>=1.2.0
 sphinxcontrib-svg2pdfconverter
 furo
 sphinxcontrib-towncrier