diff --git a/pyproject.toml b/pyproject.toml
index 1e149c26e..a9b57117c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -55,7 +55,7 @@ docs = [
     "myst_parser==2.0.0",
     "numpydoc==1.8.0",
     "sphinx-copybutton==0.5.2",
-    "sphinx==7.2.6",
+    "sphinx==8.1.3",
     "sphinx_design==0.5.0",
     "myst-nb==1.0.0",
     "sphinx-book-theme==1.1.0",