diff --git a/pkgs/development/python-modules/grpcio/default.nix b/pkgs/development/python-modules/grpcio/default.nix
index 265b631e112..5e94f8f078c 100644
--- a/pkgs/development/python-modules/grpcio/default.nix
+++ b/pkgs/development/python-modules/grpcio/default.nix
@@ -3,11 +3,11 @@
 
 buildPythonPackage rec {
   pname = "grpcio";
-  version = "1.12.1";
+  version = "1.13.0";
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "f14faadfd09aa8526536cd2149e274563f45b767fca1736ccc53803a6af3f90e";
+    sha256 = "6324581e215157f0fbe335dff2e21a65b4406db98ac7cca05f1e23b4f510b426";
   };
 
   propagatedBuildInputs = [ six protobuf ]