diff --git a/pkgs/development/python-modules/modelcif/default.nix b/pkgs/development/python-modules/modelcif/default.nix
index a0180ce04ec0..5910f0283467 100644
--- a/pkgs/development/python-modules/modelcif/default.nix
+++ b/pkgs/development/python-modules/modelcif/default.nix
@@ -9,14 +9,14 @@
 
 buildPythonPackage rec {
   pname = "modelcif";
-  version = "1.5";
+  version = "1.6";
   pyproject = true;
 
   src = fetchFromGitHub {
     owner = "ihmwg";
     repo = "python-modelcif";
     tag = version;
-    hash = "sha256-NVsADYEemnhuFwvM4lMebkU5WrqF+gL/3i6LoZ/Alt8=";
+    hash = "sha256-01tCE7uClUEpCFkdAvvjG18SwKypJ+oeQ9SbJZF3RVU=";
   };
 
   build-system = [