diff --git a/pkgs/development/python-modules/icalendar/default.nix b/pkgs/development/python-modules/icalendar/default.nix
index 1e7200cffe46..5ef8864417d4 100644
--- a/pkgs/development/python-modules/icalendar/default.nix
+++ b/pkgs/development/python-modules/icalendar/default.nix
@@ -7,12 +7,12 @@
 }:
 
 buildPythonPackage rec {
-  version = "4.0.9";
+  version = "4.1.0";
   pname = "icalendar";
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "cc73fa9c848744843046228cb66ea86cd8c18d73a51b140f7c003f760b84a997";
+    sha256 = "sha256-l0i3wC78xD5Y0GFa4JdqxPJl6Q2t7ptPiE3imQXBs5U=";
   };
 
   buildInputs = [ setuptools ];