diff --git a/pkgs/development/python-modules/mailchecker/default.nix b/pkgs/development/python-modules/mailchecker/default.nix
index b62d4a67e75..ca5b0d3184e 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 = "4.1.16";
+  version = "4.1.17";
   format = "setuptools";
 
   disabled = pythonOlder "3.7";
 
   src = fetchPypi {
     inherit pname version;
-    hash = "sha256-A+lh+BggMSJ/PIcYMfX3u/YlKVqhG5IxbrHPb1U6Ll4=";
+    hash = "sha256-NfgLI490/9YoHIXTVD890RTe+qP9rrwAFv8Xkc1IY5s=";
   };
 
   # Module has no tests