diff --git a/noxfile.py b/noxfile.py
index 4635c0c558..c34817f137 100644
--- a/noxfile.py
+++ b/noxfile.py
@@ -303,7 +303,7 @@ def docs(session):
     )
 
 
-@nox.session(python="3.9")
+@nox.session(python="3.10")
 def docfx(session):
     """Build the docfx yaml files for this library."""