diff --git a/pyproject.toml b/pyproject.toml
index d5f33f3cbd8..5a226a7225e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -59,7 +59,7 @@ tests = [
     "pytest-rerunfailures~=14.0",
 ]
 doc = [
-    "Sphinx==8.0.2",
+    "Sphinx==8.1.3",
     "numpydoc==1.8.0",
     "ansys-sphinx-theme==1.1.1",
     "sphinx-copybutton==0.5.2",