diff --git a/pyproject.toml b/pyproject.toml
index 63a484f3c..8b0427f9d 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -45,7 +45,7 @@ doc = [
     "matplotlib==3.9.3",
     "numpydoc==1.8.0",
     "pypandoc==1.14",
-    "Sphinx==7.4.7",
+    "Sphinx==8.1.3",
     "sphinx-copybutton==0.5.2",
     "sphinx-gallery==0.18.0",
     "sphinxcontrib-images==0.9.4",