diff --git a/pkgs/development/python-modules/mailchecker/default.nix b/pkgs/development/python-modules/mailchecker/default.nix
index ce47d6b3a2d5..83485f4252b8 100644
--- a/pkgs/development/python-modules/mailchecker/default.nix
+++ b/pkgs/development/python-modules/mailchecker/default.nix
@@ -6,14 +6,14 @@
 
 buildPythonPackage rec {
   pname = "mailchecker";
-  version = "4.1.8";
+  version = "4.1.9";
   format = "setuptools";
 
   disabled = pythonOlder "3.7";
 
   src = fetchPypi {
     inherit pname version;
-    hash = "sha256-RLZunjRX7lljKQl+sJ/py8bTR/YZsDewTJao9IBuLbE=";
+    hash = "sha256-vr70AB8EiOmb8lgwrq78iTnHdrp14Ppyh57Trh8SQ8Q=";
   };
 
   # Module has no tests