diff --git a/.readthedocs.yml b/.readthedocs.yml
index 98ab941d..ab14297f 100644
--- a/.readthedocs.yml
+++ b/.readthedocs.yml
@@ -10,7 +10,7 @@ version: 2
 build:
   os: "ubuntu-22.04"
   tools:
-    python: "3.13"
+    python: "3.14"
   apt_packages:
     - plantuml
 
@@ -26,7 +26,7 @@ build:
 
     # Install dependencies using `uv`.
     install:
-      - uv pip install -r docs/requirements.txt
+      - uv pip install --upgrade -r docs/requirements.txt
 
     # Bundle assets, because `pip install --editable=.` does not do it.
     pre_build:
diff --git a/CHANGES.rst b/CHANGES.rst
index 278bfcc5..c4e9aeea 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -8,6 +8,7 @@ Unreleased
 - Made driver projects use a standalone primary navigation
 - Removed outmoded database drivers section
 - Added external-link icon to Support and Community TOC entries.
+- Dependencies: Permitted installation of Sphinx 9.x
 
 2026/01/14 0.47.0
 -----------------
diff --git a/docs/conf.py b/docs/conf.py
index f835f8e0..d8e743ea 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -34,3 +34,8 @@
 intersphinx_mapping["myst"] = ("https://myst-parser.readthedocs.io/en/latest/", None)
 intersphinx_mapping["sd"] = ("https://sphinx-design.readthedocs.io/en/latest/", None)
 intersphinx_mapping["sde"] = ("https://sphinx-design-elements.readthedocs.io/en/latest/", None)
+
+
+linkcheck_ignore += [
+    "https://github.com/",
+]
diff --git a/setup.py b/setup.py
index d915ed52..b1b4dd66 100644
--- a/setup.py
+++ b/setup.py
@@ -62,12 +62,12 @@
         "jinja2>=3,<4",
         "jupysql<0.12",
         "myst-nb<1.4",
-        "myst-parser[linkify]<5",
+        "myst-parser[linkify]<6",
         "snowballstemmer<4",
-        "sphinx>=7.1,<9",
+        "sphinx>=7.1,<10",
         "sphinx-basic-ng==1.0.0b2",
         "sphinx-copybutton>=0.3.1,<1",
-        "sphinx-design-elements==0.4.1",
+        "sphinx-design-elements<0.5",
         "sphinx-inline-tabs",
         "sphinx-sitemap<2.10.0",
         "sphinx-togglebutton<1",