diff --git a/pkgs/development/python-modules/irm-kmi-api/default.nix b/pkgs/development/python-modules/irm-kmi-api/default.nix
index 91e32ab59695..c37213c348c9 100644
--- a/pkgs/development/python-modules/irm-kmi-api/default.nix
+++ b/pkgs/development/python-modules/irm-kmi-api/default.nix
@@ -12,14 +12,14 @@
 
 buildPythonPackage rec {
   pname = "irm-kmi-api";
-  version = "1.1.0";
+  version = "1.1.1";
   pyproject = true;
 
   src = fetchFromGitHub {
     owner = "jdejaegh";
     repo = "irm-kmi-api";
     tag = version;
-    hash = "sha256-E8lf2TpeA91mRbxXYCsuum0mJdE5XLXX0l8CKEl5SFw=";
+    hash = "sha256-RJMIXisgG4ybynsm7kCrN8zOU0EJv7a1Q74l+edxH/E=";
   };
 
   build-system = [ setuptools ];