diff --git a/pkgs/development/python-modules/grpcio-testing/default.nix b/pkgs/development/python-modules/grpcio-testing/default.nix
index 33ec8143c265..de158fed55a1 100644
--- a/pkgs/development/python-modules/grpcio-testing/default.nix
+++ b/pkgs/development/python-modules/grpcio-testing/default.nix
@@ -10,7 +10,7 @@
 
 buildPythonPackage rec {
   pname = "grpcio-testing";
-  version = "1.64.1";
+  version = "1.65.1";
   pyproject = true;
 
   disabled = pythonOlder "3.7";
@@ -18,7 +18,7 @@ buildPythonPackage rec {
   src = fetchPypi {
     pname = "grpcio_testing";
     inherit version;
-    hash = "sha256-Nta9aurAzEg/iUlYE35Jz7uQ+syH4NMnHNuMGq7XEBw=";
+    hash = "sha256-AdYhmtubPYxmrGYIbd5LpSu28icVxMzeYO7Qp4RQysE=";
   };
 
   postPatch = ''