diff --git a/pyproject.toml b/pyproject.toml
index 902196e3d..4a0c3874c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -82,7 +82,7 @@ dev = [
     "polars>=0.20.3",
 ]
 doc = [
-    "sphinx>=8.0.0",
+    "sphinx",
     "docutils",
     "sphinxext_altair",
     "jinja2",