diff --git a/pkgs/development/libraries/haskell/iCalendar/default.nix b/pkgs/development/libraries/haskell/iCalendar/default.nix
index 635254bca75..734c7587aa9 100644
--- a/pkgs/development/libraries/haskell/iCalendar/default.nix
+++ b/pkgs/development/libraries/haskell/iCalendar/default.nix
@@ -1,23 +1,17 @@
 # This file was auto-generated by cabal2nix. Please do NOT edit manually!
 
 { cabal, base64Bytestring, caseInsensitive, dataDefault, mime, mtl
-, network, networkUri, parsec, text, time, fetchpatch
+, network, networkUri, parsec, text, time
 }:
 
 cabal.mkDerivation (self: {
   pname = "iCalendar";
-  version = "0.4.0.1";
-  sha256 = "08m47nxxz70lmmndlgycfb27x8xfwakxi8izbba0f6w23ddaljp3";
+  version = "0.4.0.2";
+  sha256 = "0a6kj6ih8dpzvld7hjvjp6gcf4f2y81x6bx17z6wgzwdj9fv7jry";
   buildDepends = [
     base64Bytestring caseInsensitive dataDefault mime mtl network
     networkUri parsec text time
   ];
-  patches = [
-    (fetchpatch {
-      url = "https://github.com/tingtun/iCalendar/pull/14.patch";
-      sha256 = "0pyzlshckvbqns3yryh9pm5r3n2hpqx0c2i3niyqsh6a1lk9hc5m";
-    })
-  ];
   meta = {
     homepage = "http://github.com/tingtun/iCalendar";
     description = "iCalendar data types, parser, and printer";