diff --git a/pkgs/development/python-modules/Cython/default.nix b/pkgs/development/python-modules/Cython/default.nix
index a9488b540e2..dd403ae5caf 100644
--- a/pkgs/development/python-modules/Cython/default.nix
+++ b/pkgs/development/python-modules/Cython/default.nix
@@ -13,11 +13,11 @@
 
 buildPythonPackage rec {
   pname = "Cython";
-  version = "0.28.2";
+  version = "0.28.3";
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "634e2f10fc8d026c633cffacb45cd8f4582149fa68e1428124e762dbc566e68a";
+    sha256 = "1aae6d6e9858888144cea147eb5e677830f45faaff3d305d77378c3cba55f526";
   };
 
   nativeBuildInputs = [