diff --git a/pyproject.toml b/pyproject.toml
index 5c6b59a..3bd5c41 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -31,7 +31,7 @@ dns_exporter = "dns_exporter.entrypoint:main"
 [project.optional-dependencies]
 dev = ["twine == 4.0.2", "pre-commit == 3.3.3", "setuptools-scm == 7.1.0", "build==1.0.3"]
 test = ["pytest == 7.4.4", "pytest-cov==4.0.0", "tox == 4.12.1", "requests==2.28.2"]
-docs = ["Sphinx==7.0.1", "furo==2023.3.27"]
+docs = ["Sphinx==7.0.1", "furo==2023.9.10"]
 
 [project.urls]
 homepage = "https://github.com/tykling/dns_exporter"