diff --git a/pyproject.toml b/pyproject.toml
index 6bab593..9782c56 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -51,7 +51,7 @@ tests = [
 ]
 
 docs = [
-    'sphinx~=8.0.2',
+    'sphinx~=8.1.3',
     'sphinx-copybutton~=0.5.2',
     'sphinx-book-theme~=1.1.2',
     'sphinx-click~=6.0.0',