diff --git a/pkgs/development/python-modules/grpcio-reflection/default.nix b/pkgs/development/python-modules/grpcio-reflection/default.nix
index 3ed0064e081f..35fb1faaeaef 100644
--- a/pkgs/development/python-modules/grpcio-reflection/default.nix
+++ b/pkgs/development/python-modules/grpcio-reflection/default.nix
@@ -9,13 +9,13 @@
 
 buildPythonPackage rec {
   pname = "grpcio-reflection";
-  version = "1.65.4";
+  version = "1.66.2";
   pyproject = true;
 
   src = fetchPypi {
     pname = "grpcio_reflection";
     inherit version;
-    hash = "sha256-jGuWDD9DBoHoivWfafq1pXW3eyn1xqHXFuqsXPHBpJ0=";
+    hash = "sha256-rdgn4t61bpaAPIKs4dTnf6DI7DdH1jmOmVH3OdcQZ9Q=";
   };
 
   build-system = [ setuptools ];