diff --git a/pkgs/development/python-modules/grpcio/default.nix b/pkgs/development/python-modules/grpcio/default.nix
index b434848006a..265b631e112 100644
--- a/pkgs/development/python-modules/grpcio/default.nix
+++ b/pkgs/development/python-modules/grpcio/default.nix
@@ -3,11 +3,11 @@
 
 buildPythonPackage rec {
   pname = "grpcio";
-  version = "1.12.0";
+  version = "1.12.1";
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "0dsw58aimr8yyb6cgdvs7b7jc0rz2k9vhrsfglg2h7bmh83izzg1";
+    sha256 = "f14faadfd09aa8526536cd2149e274563f45b767fca1736ccc53803a6af3f90e";
   };
 
   propagatedBuildInputs = [ six protobuf ]