diff --git a/pyproject.toml b/pyproject.toml
index 26dad62ffa1..e433fe64eaf 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -46,7 +46,7 @@ jschon = "^0.11.1"
 optional = true
 
 [tool.poetry.group.docs.dependencies]
-sphinx = "^4.4"
+sphinx = "^8.0.0"
 sphinx-issues = "^3.0.1"
 sphinx-rtd-theme = "^1.0"