diff --git a/pyproject.toml b/pyproject.toml
index e59ec713..e0a0e069 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -57,7 +57,7 @@ all = [
 dev = [
   "ruff==0.4.0",
   "pre-commit",
-  "sphinx==7.2.6",
+  "sphinx==8.1.3",
   "sphinx-theme-pd==0.8.3",
   "sphinxawesome-theme",
   "pytest",