diff --git a/pkgs/development/libraries/grpc/default.nix b/pkgs/development/libraries/grpc/default.nix
index 8cd26ab31052..c00e5a4e0d30 100644
--- a/pkgs/development/libraries/grpc/default.nix
+++ b/pkgs/development/libraries/grpc/default.nix
@@ -17,13 +17,13 @@
 
 stdenv.mkDerivation rec {
   pname = "grpc";
-  version = "1.41.0"; # N.B: if you change this, change pythonPackages.grpcio-tools to a matching version too
+  version = "1.42.0"; # N.B: if you change this, change pythonPackages.grpcio-tools to a matching version too
 
   src = fetchFromGitHub {
     owner = "grpc";
     repo = "grpc";
     rev = "v${version}";
-    sha256 = "1mcgnzwc2mcdpcfhc1b37vff0biwyd3v0a2ack58wgf4336pzlsb";
+    sha256 = "sha256-9/ywbnvd8hqeblFe+X9SM6PkRPB/yqE8Iw9TNmLMSOE=";
     fetchSubmodules = true;
   };