diff --git a/pyproject.toml b/pyproject.toml
old mode 100755
new mode 100644
index 5528ffbc..ac93098d
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -85,7 +85,7 @@ doc = [
     "numpydoc==1.8.0",
     "pillow==10.4.0",
     "docker>=7.1.0",
-    "Sphinx==7.2.6",
+    "Sphinx==8.1.3",
     "sphinx-copybutton==0.5.2",
     "sphinx-gallery==0.18.0",
 ]
@@ -104,7 +104,7 @@ dev = [
     "docker>=7.1.0",
     "pytest==8.3.3",
     "pytest-cov==4.1.0",
-    "Sphinx==7.2.6",
+    "Sphinx==8.1.3",
     "sphinx-copybutton==0.5.2",
     "sphinx-gallery==0.18.0",
     "pre-commit==3.3.3",