diff --git a/pyproject.toml b/pyproject.toml
index 4813e0e..653acbf 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -61,7 +61,7 @@ optional-dependencies.dev = [
     # use it to lint shell commands in GitHub workflow files.
     "shellcheck-py==0.10.0.1",
     "shfmt-py==3.7.0.1",
-    "sphinx==8.2.1",
+    "sphinx==8.2.3",
     "sphinx-copybutton==0.5.2",
     "sphinx-lint==1.0.0",
     "sphinx-pyproject==0.3.0",