diff --git a/pkgs/development/python-modules/msgpack/default.nix b/pkgs/development/python-modules/msgpack/default.nix
index 262e5d5ecd0e..3feeca74ccd6 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 = "1.0.2";
+  version = "1.0.3";
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "1109s2yynrahwi64ikax68hx0mbclz8p35afmpphw5dwynb49q7s";
+    sha256 = "51fdc7fb93615286428ee7758cecc2f374d5ff363bdd884c7ea622a7a327a81e";
   };
 
   checkPhase = ''