diff --git a/pkgs/development/python-modules/aniso8601/default.nix b/pkgs/development/python-modules/aniso8601/default.nix
index 163e2c9b209..b637f60696d 100644
--- a/pkgs/development/python-modules/aniso8601/default.nix
+++ b/pkgs/development/python-modules/aniso8601/default.nix
@@ -3,7 +3,7 @@
 
 buildPythonPackage rec {
   pname = "aniso8601";
-  version = "4.0.1";
+  version = "4.1.0";
 
   meta = with stdenv.lib; {
     description = "Parses ISO 8601 strings.";
@@ -15,6 +15,6 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "15cwnadw2xdczdi13k9grrgqq67hxgys4l155dqsl2zh3glhsmp7";
+    sha256 = "1x49k287ky1spv3msc9fwmc7ydyw6rlcr14nslgcmpjfn3pgzh03";
   };
 }