diff --git a/pkgs/development/python-modules/mailchecker/default.nix b/pkgs/development/python-modules/mailchecker/default.nix
index 36b1e9f42d14..50516ae32e6a 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 = "5.0.0";
+  version = "5.0.1";
   format = "setuptools";
 
   disabled = pythonOlder "3.7";
 
   src = fetchPypi {
     inherit pname version;
-    hash = "sha256-d8RG/PSWPHvQy7o9tPLPGrEp0r/Y3JWwWoT3cS4iR38=";
+    hash = "sha256-fJoV/mNImdcTpJC6c2zmYWZCXlBWLOP+5W5Hsmw2yOQ=";
   };
 
   # Module has no tests