diff --git a/pkgs/development/libraries/grpc/default.nix b/pkgs/development/libraries/grpc/default.nix
index 780f8c5f0b5a..8883761c5d19 100644
--- a/pkgs/development/libraries/grpc/default.nix
+++ b/pkgs/development/libraries/grpc/default.nix
@@ -3,13 +3,13 @@
 }:
 
 stdenv.mkDerivation rec {
-  version = "1.36.1"; # N.B: if you change this, change pythonPackages.grpcio-tools to a matching version too
+  version = "1.36.4"; # N.B: if you change this, change pythonPackages.grpcio-tools to a matching version too
   pname = "grpc";
   src = fetchFromGitHub {
     owner = "grpc";
     repo = "grpc";
     rev = "v${version}";
-    sha256 = "0lb6pls9m05bvr6bvqzp6apdchhsazc5866yvmgkm979xcrzdy2z";
+    sha256 = "1zxvdg5vgjgkq5wmzwbxj2zydaj90ja074axs26yzd9x08j0bjxz";
     fetchSubmodules = true;
   };
   patches = [