diff --git a/pkgs/development/python-modules/grpc-google-iam-v1/default.nix b/pkgs/development/python-modules/grpc-google-iam-v1/default.nix
index 1be825227e8d..eb47b502d82a 100644
--- a/pkgs/development/python-modules/grpc-google-iam-v1/default.nix
+++ b/pkgs/development/python-modules/grpc-google-iam-v1/default.nix
@@ -7,11 +7,11 @@
 
 buildPythonPackage rec {
   pname = "grpc-google-iam-v1";
-  version = "0.12.3";
+  version = "0.12.4";
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "0bfb5b56f648f457021a91c0df0db4934b6e0c300bd0f2de2333383fe958aa72";
+    sha256 = "sha256-PwrCyUC5qFXXzn4x/eKL3bDZrDYtMtB8ZxSDBpMaDjA=";
   };
 
   propagatedBuildInputs = [ grpcio googleapis-common-protos ];