diff --git a/pyproject.toml b/pyproject.toml
index 41b7bef..915268b 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -25,7 +25,7 @@ Issues = "https://github.com/marshmallow-code/marshmallow-sqlalchemy/issues"
 Source = "https://github.com/marshmallow-code/marshmallow-sqlalchemy"
 
 [project.optional-dependencies]
-docs = ["sphinx==7.4.5", "alabaster==1.0.0", "sphinx-issues==4.1.0"]
+docs = ["sphinx==8.0.2", "alabaster==1.0.0", "sphinx-issues==4.1.0"]
 tests = ["pytest<9", "pytest-lazy-fixtures"]
 dev = ["marshmallow-sqlalchemy[tests]", "tox", "pre-commit~=3.5"]