diff --git a/traitlets/traitlets.py b/traitlets/traitlets.py
index 59974151..8ceedc6b 100644
--- a/traitlets/traitlets.py
+++ b/traitlets/traitlets.py
@@ -1838,6 +1838,7 @@ def make_dynamic_default(self):
 class Any(TraitType):
     """A trait which allows any value."""
     default_value = None
+    allow_none = True
     info_text = 'any value'