diff --git a/doc/changelog.d/3696.dependencies.md b/doc/changelog.d/3696.dependencies.md
new file mode 100644
index 00000000000..393e694a724
--- /dev/null
+++ b/doc/changelog.d/3696.dependencies.md
@@ -0,0 +1 @@
+bump sphinx from 7.4.7 to 8.1.3
\ No newline at end of file
diff --git a/pyproject.toml b/pyproject.toml
index 9d304fa095d..a989f5619df 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -59,7 +59,7 @@ tests = [
     "pytest-xdist==3.6.1",
 ]
 docs = [
-    "Sphinx==7.4.7",
+    "Sphinx==8.1.3",
     "jupyter_sphinx==0.5.3",
     "numpydoc==1.8.0",
     "matplotlib==3.10.0",