diff --git a/pkgs/development/python-modules/mongomock/default.nix b/pkgs/development/python-modules/mongomock/default.nix
index 0f2f305c97c3..85e574f0b6d5 100644
--- a/pkgs/development/python-modules/mongomock/default.nix
+++ b/pkgs/development/python-modules/mongomock/default.nix
@@ -9,11 +9,11 @@
 
 buildPythonPackage rec {
   pname = "mongomock";
-  version = "3.23.0";
+  version = "4.0.0";
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "1pdh4pj5n6dsaqy98q40wig5y6imfs1p043cgkaaw8f2hxy5x56r";
+    sha256 = "sha256-sYMsN0jUdETBiGc3PlzqdUwub2RKDPv9Zn8Xj2i97Pw=";
   };
 
   nativeBuildInputs = [