diff --git a/nooz/300.misc.rst b/nooz/300.misc.rst
index bd5e217..0fe5c38 100644
--- a/nooz/300.misc.rst
+++ b/nooz/300.misc.rst
@@ -1,3 +1,3 @@
-Update to and pin latest `msgpack-python` (0.5.6) and `msgspec` (0.4.0)
+Update to and pin latest `msgpack` (1.0.3) and `msgspec` (0.4.0)
 both of which required adjustments for backwards imcompatible API
 tweaks.
diff --git a/setup.py b/setup.py
index 631d151..dd00715 100755
--- a/setup.py
+++ b/setup.py
@@ -56,7 +56,7 @@ setup(
         'pdbpp',
 
         # serialization
-        'msgpack',
+        'msgpack>=1.0.3',
 
     ],
     extras_require={