diff --git a/pkgs/tools/networking/grpc_cli/default.nix b/pkgs/tools/networking/grpc_cli/default.nix
index d7a01b92dc45..582b8c017cc0 100644
--- a/pkgs/tools/networking/grpc_cli/default.nix
+++ b/pkgs/tools/networking/grpc_cli/default.nix
@@ -2,12 +2,12 @@
 
 stdenv.mkDerivation rec {
   pname = "grpc_cli";
-  version = "1.66.1";
+  version = "1.66.2";
   src = fetchFromGitHub {
     owner = "grpc";
     repo = "grpc";
     rev = "v${version}";
-    hash = "sha256-CmQUUbIYPWRS7q7OX+TmkTvoqtJAUEwhL/lev8JdB8U=";
+    hash = "sha256-nka7ZzyZIeEAPaz7v/8RAeo9XmkgrOrHpor3siAx7Ec=";
     fetchSubmodules = true;
   };
   nativeBuildInputs = [ automake cmake autoconf ];