diff --git a/pkgs/development/python-modules/mailchecker/default.nix b/pkgs/development/python-modules/mailchecker/default.nix
index 0a4db11e4e1c..96650858ffbc 100644
--- a/pkgs/development/python-modules/mailchecker/default.nix
+++ b/pkgs/development/python-modules/mailchecker/default.nix
@@ -8,14 +8,14 @@
 
 buildPythonPackage rec {
   pname = "mailchecker";
-  version = "6.0.16";
+  version = "6.0.17";
   pyproject = true;
 
   disabled = pythonOlder "3.7";
 
   src = fetchPypi {
     inherit pname version;
-    hash = "sha256-XZT70Nc1L/WGPM4tRgOrjs1N1AUD4O1V/evjcqS5qOk=";
+    hash = "sha256-FHIFsBltIe1BMiN9hzP99uig9mq68hQ0p5D9C8utClw=";
   };
 
   build-system = [ setuptools ];