diff --git a/pkgs/development/python-modules/modelcif/default.nix b/pkgs/development/python-modules/modelcif/default.nix
index 5604a067734d..47c167237836 100644
--- a/pkgs/development/python-modules/modelcif/default.nix
+++ b/pkgs/development/python-modules/modelcif/default.nix
@@ -10,14 +10,14 @@
 
 buildPythonPackage rec {
   pname = "modelcif";
-  version = "1.0";
+  version = "1.1";
   pyproject = true;
 
   src = fetchFromGitHub {
     owner = "ihmwg";
     repo = "python-modelcif";
     rev = "refs/tags/${version}";
-    hash = "sha256-zJLwBdyUyWnH1hBx9Kejl5NfY7zJUxeGb//swBT02Dw=";
+    hash = "sha256-HUS9MW6jbwjK3I6egmmsH+Bx+nNgszWc3t3QRo/EWpc=";
   };
 
   nativeBuildInputs = [