diff --git a/pkgs/development/python-modules/gwcs/default.nix b/pkgs/development/python-modules/gwcs/default.nix
index d808f4bdd6bc..128316741bcc 100644
--- a/pkgs/development/python-modules/gwcs/default.nix
+++ b/pkgs/development/python-modules/gwcs/default.nix
@@ -16,14 +16,14 @@
 
 buildPythonPackage (finalAttrs: {
   pname = "gwcs";
-  version = "1.0.1";
+  version = "1.0.3";
   pyproject = true;
 
   src = fetchFromGitHub {
     owner = "spacetelescope";
     repo = "gwcs";
     tag = finalAttrs.version;
-    hash = "sha256-0iUnapBn8yDCx1tqHD10Ljid15yBuqlICyFuva2LNPk=";
+    hash = "sha256-Wh+3xVjXjTSlmlZuia2Jclj6tzjqlYDQ+giocGEkyAE=";
   };
 
   postPatch = ''