diff --git a/pkgs/development/python-modules/msgpack/default.nix b/pkgs/development/python-modules/msgpack/default.nix
index 20be837782a..8095c151da7 100644
--- a/pkgs/development/python-modules/msgpack/default.nix
+++ b/pkgs/development/python-modules/msgpack/default.nix
@@ -6,11 +6,11 @@
 
 buildPythonPackage rec {
   pname = "msgpack";
-  version = "0.6.2";
+  version = "1.0.0";
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "ea3c2f859346fcd55fc46e96885301d9c2f7a36d453f5d8f2967840efa1e1830";
+    sha256 = "1h5mxh84rcw04dvxy1qbfn2hisavfqgilh9k09rgyjhd936dad4m";
   };
 
   checkPhase = ''