diff --git a/pkgs/development/python-modules/rfc3339-validator/default.nix b/pkgs/development/python-modules/rfc3339-validator/default.nix
index 07bc719698a..6294eee7f34 100644
--- a/pkgs/development/python-modules/rfc3339-validator/default.nix
+++ b/pkgs/development/python-modules/rfc3339-validator/default.nix
@@ -10,23 +10,14 @@
 
 buildPythonPackage rec {
   pname = "rfc3339-validator";
-  version = "0.1.3";
+  version = "0.1.4";
 
   src = fetchPypi {
     pname = "rfc3339_validator";
     inherit version;
-    sha256 = "7a578aa0740e9ee2b48356fe1f347139190c4c72e27f303b3617054efd15df32";
+    sha256 = "0srg0b89aikzinw72s433994k5gv5lfyarq1adhas11kz6yjm2hk";
   };
 
-  patches = [
-    # Fixes test failure on darwin. Filed upstream: https://github.com/naimetti/rfc3339-validator/pull/3.
-    # Not yet merged.
-    (fetchpatch {
-      url = "https://github.com/rmcgibbo/rfc3339-validator/commit/4b6bb62c30bd158d3b4663690dcba1084ac31770.patch";
-      sha256 = "0h9k82hhmp2xfzn49n3i47ws3rpm9lvfs2rjrds7hgx5blivpwl6";
-    })
-  ];
-
   propagatedBuildInputs = [ six ];
 
   checkInputs = [ pytestCheckHook hypothesis strict-rfc3339 ];