diff --git a/.github/workflows/publish.yaml b/.github/workflows/publish.yaml
index d815e8a7..0f59ae70 100644
--- a/.github/workflows/publish.yaml
+++ b/.github/workflows/publish.yaml
@@ -13,7 +13,7 @@ env:
   BASE_IMAGE_USER: ghcr.io/driplineorg
   BASE_IMAGE_REPO: dripline-cpp
   DEV_SUFFIX: '-dev'
-  BASE_IMAGE_TAG: 'v2.10.9'
+  BASE_IMAGE_TAG: 'v2.10.10'
 #  BASE_IMAGE_TAG: 'dlcpp-hf2.10.8'
 #  DEV_SUFFIX: ''
 
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 8012bd79..ef8ed7e4 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,5 +1,5 @@
 cmake_minimum_required(VERSION 3.5)  # <3.5 is deprecated by CMake
-project( DriplinePy VERSION 5.1.2 )
+project( DriplinePy VERSION 5.1.3 )
 
 cmake_policy( SET CMP0074 NEW )
 
diff --git a/Dockerfile b/Dockerfile
index 43b18bc6..85dd7c9f 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,7 +1,7 @@
 ARG img_user=ghcr.io/driplineorg
 ARG img_repo=dripline-cpp
 #ARG img_tag=dlcpp-hf2.10.8
-ARG img_tag=v2.10.9
+ARG img_tag=v2.10.10
 
 FROM ${img_user}/${img_repo}:${img_tag} AS deps
 
diff --git a/bin/dl-serve b/bin/dl-serve
index 19376b42..797fd392 100755
--- a/bin/dl-serve
+++ b/bin/dl-serve
@@ -66,7 +66,7 @@ class Serve(dripline.core.ObjectCreator):
         self.handler.setLevel(verbosity)
         logger.setLevel(verbosity)
 
-        sig_handler = scarab.SignalHandler()
+        sig_handler = scarab.SignalHandler(True)
 
         # Prior to v4.8.0, service configuration information was nested within the `runtime-config` block
         # This deprecates that usage and moves everything within `runtime-config` to the top level of the configuration
diff --git a/changelog.md b/changelog.md
index 5112f4aa..ed94612a 100644
--- a/changelog.md
+++ b/changelog.md
@@ -5,19 +5,32 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+Types of changes: Added, Changed, Deprecated, Removed, Fixed, Security
+
 ## [Unreleased]
 
 
+## [5.1.3] - 2026-01-22
+
+### Changed
+
+- Updated dl-cpp version to v2.10.10
+
+### Fixed
+
+- Receiver class binding switched to use smart holder; all other bindings switched to smart holder too, except where that doesn't work
+
+
 ## [5.1.2] - 2025-12-03
 
-## Changed
+### Changed
 
 - Updated dl-cpp version to v2.10.9
 
 
 ## [5.1.1] - 2025-11-05
 
-## Changed
+### Changed
 
 - Updated dl-cpp version to v2.10.8
 
diff --git a/chart/Chart.yaml b/chart/Chart.yaml
index cbb96c0b..8a97a812 100644
--- a/chart/Chart.yaml
+++ b/chart/Chart.yaml
@@ -1,7 +1,7 @@
 apiVersion: v1
 ## the appVersion is used as the container image tag for the main container in the pod from the deployment
 ## it can be overridden by a values.yaml file in image.tag
-appVersion: "v5.1.2"
+appVersion: "v5.1.3"
 description: Deploy a dripline-python microservice
 name: dripline-python
 version: 1.1.2
diff --git a/module_bindings/dripline_core/core_pybind.hh b/module_bindings/dripline_core/core_pybind.hh
index 792c1954..280df256 100644
--- a/module_bindings/dripline_core/core_pybind.hh
+++ b/module_bindings/dripline_core/core_pybind.hh
@@ -19,9 +19,7 @@ namespace dripline_pybind
         std::list< std::string > all_items;
 
         all_items.push_back( "SentMessagePackage" );
-        pybind11::class_< dripline::sent_msg_pkg,
-                          std::shared_ptr< dripline::sent_msg_pkg >
-                        >( mod, "SentMessagePackage", "Data structure for sent messages" )
+        pybind11::classh< dripline::sent_msg_pkg >( mod, "SentMessagePackage", "Data structure for sent messages" )
             .def_property_readonly( "successful_send", [](const dripline::sent_msg_pkg& an_obj){ return an_obj.f_successful_send; } )
             .def_property_readonly( "send_error_message", [](const dripline::sent_msg_pkg& an_obj){ return an_obj.f_send_error_message; } )
             ;
diff --git a/module_bindings/dripline_core/dripline_config_pybind.hh b/module_bindings/dripline_core/dripline_config_pybind.hh
index d3c35414..a71a1bc9 100644
--- a/module_bindings/dripline_core/dripline_config_pybind.hh
+++ b/module_bindings/dripline_core/dripline_config_pybind.hh
@@ -14,6 +14,7 @@ namespace dripline_pybind
         std::list< std::string > all_members;
 
         all_members.push_back( "DriplineConfig" );
+        // scarab::param_node uses class_, so we don't use classh here
         pybind11::class_< dripline::dripline_config, scarab::param_node >( mod, "DriplineConfig" )
             .def( pybind11::init<>(), DL_BIND_CALL_GUARD_STREAMS )
             ;
diff --git a/module_bindings/dripline_core/message_pybind.hh b/module_bindings/dripline_core/message_pybind.hh
index c4fe5723..69a0f463 100644
--- a/module_bindings/dripline_core/message_pybind.hh
+++ b/module_bindings/dripline_core/message_pybind.hh
@@ -8,8 +8,6 @@
 
 #include "uuid.hh"
 
-#include "logger.hh"
-
 #include "pybind11/pybind11.h"
 #include "pybind11/iostream.h"
 #include "pybind11/eval.h"
@@ -17,7 +15,6 @@
 #include <boost/uuid/uuid_io.hpp>
 #include <boost/lexical_cast.hpp>
 
-LOGGER( dlog_mph, "message_pybind.hh" )
 
 namespace dripline_pybind
 {
diff --git a/module_bindings/dripline_core/receiver_pybind.hh b/module_bindings/dripline_core/receiver_pybind.hh
index 56326692..f078c12d 100644
--- a/module_bindings/dripline_core/receiver_pybind.hh
+++ b/module_bindings/dripline_core/receiver_pybind.hh
@@ -14,7 +14,7 @@ namespace dripline_pybind
         std::list< std::string > all_members;
 
         all_members.push_back( "Receiver" );
-        pybind11::class_< dripline::receiver, scarab::cancelable, std::shared_ptr<dripline::receiver> >( mod, "Receiver", "Collect and combine message chunks into a full message object")
+        pybind11::classh< dripline::receiver, scarab::cancelable >( mod, "Receiver", "Collect and combine message chunks into a full message object")
             .def( pybind11::init<>() )
 
             .def_property( "single_message_wait_ms",
diff --git a/module_bindings/dripline_core/return_code_trampoline.hh b/module_bindings/dripline_core/return_code_trampoline.hh
index f664307c..e615d0b0 100644
--- a/module_bindings/dripline_core/return_code_trampoline.hh
+++ b/module_bindings/dripline_core/return_code_trampoline.hh
@@ -8,7 +8,7 @@
 namespace dripline_pybind
 {
 
-    class return_code_trampoline : public dripline::return_code
+    class return_code_trampoline : public dripline::return_code, public pybind11::trampoline_self_life_support
     {
         public:
             using dripline::return_code::return_code;
diff --git a/module_bindings/dripline_core/return_codes_pybind.hh b/module_bindings/dripline_core/return_codes_pybind.hh
index 97d9f95b..c77dd6af 100644
--- a/module_bindings/dripline_core/return_codes_pybind.hh
+++ b/module_bindings/dripline_core/return_codes_pybind.hh
@@ -11,11 +11,10 @@
 
 namespace dripline_pybind
 {
-    LOGGER( dl_pybind_retcode, "return_codes_pybind" );
     // Macro for binding dripline-cpp return codes; note, it uses local variables defined and scoped in this header
 #define ADD_DRIPLINE_RET_CODE( cpp_name, py_name ) \
     all_items.push_back( "DL_" #py_name ); \
-    pybind11::class_< dripline::dl_##cpp_name, dripline::return_code >( mod, "DL_" #py_name, "" ) \
+    pybind11::classh< dripline::dl_##cpp_name, dripline::return_code >( mod, "DL_" #py_name, "" ) \
         .def( pybind11::init<>() ) \
         .def_property_readonly( "value", &dripline::dl_##cpp_name::rc_value ) \
         .def_property_readonly( "name", &dripline::dl_##cpp_name::rc_name ) \
@@ -28,7 +27,7 @@ namespace dripline_pybind
         std::list< std::string > all_items;
 
         all_items.push_back( "ReturnCode" );
-        pybind11::class_< dripline::return_code, return_code_trampoline >( mod, "ReturnCode", "base class for return codes" )
+        pybind11::classh< dripline::return_code, return_code_trampoline >( mod, "ReturnCode", "base class for return codes" )
             .def( pybind11::init<>() )
             .def_property_readonly( "value", &dripline::return_code::rc_value, "return code value" )
             .def_property_readonly( "name", &dripline::return_code::rc_name, "return code name" )
diff --git a/module_bindings/dripline_core/run_simple_service_pybind.hh b/module_bindings/dripline_core/run_simple_service_pybind.hh
index c523259a..d6397d0c 100644
--- a/module_bindings/dripline_core/run_simple_service_pybind.hh
+++ b/module_bindings/dripline_core/run_simple_service_pybind.hh
@@ -13,7 +13,7 @@ namespace dripline_pybind
     {
         std::list< std::string > all_items;
         all_items.push_back( "simple_service" );
-        pybind11::class_< dripline::simple_service, std::shared_ptr< dripline::simple_service > >( mod, "simple_service", "Minimal example of a dripline service" )
+        pybind11::classh< dripline::simple_service >( mod, "simple_service", "Minimal example of a dripline service" )
             .def( pybind11::init< const scarab::param_node& >() )
             .def( "execute", &dripline::simple_service::execute, DL_BIND_CALL_GUARD_STREAMS_AND_GIL )
             ;
diff --git a/module_bindings/dripline_core/service_config_pybind.hh b/module_bindings/dripline_core/service_config_pybind.hh
index 653fab49..150d0527 100644
--- a/module_bindings/dripline_core/service_config_pybind.hh
+++ b/module_bindings/dripline_core/service_config_pybind.hh
@@ -14,6 +14,7 @@ namespace dripline_pybind
         std::list< std::string > all_members;
 
         all_members.push_back( "ServiceConfig" );
+        // scarab::param_node uses class_, so we don't use classh here
         pybind11::class_< dripline::service_config, scarab::param_node >( mod, "ServiceConfig" )
             .def( pybind11::init< const std::string& >(), 
                   DL_BIND_CALL_GUARD_STREAMS,
diff --git a/module_bindings/dripline_core/specifier_pybind.hh b/module_bindings/dripline_core/specifier_pybind.hh
index 78dbb138..b37737cf 100644
--- a/module_bindings/dripline_core/specifier_pybind.hh
+++ b/module_bindings/dripline_core/specifier_pybind.hh
@@ -10,8 +10,7 @@ namespace dripline_pybind
     {
         std::list< std::string > all_items;
         all_items.push_back( "Specifier" );
-        pybind11::class_< dripline::specifier, std::shared_ptr< dripline::specifier >
-                        >( mod, "Specifier", "All routing key content after the first '.' delimiter" )
+        pybind11::classh< dripline::specifier >( mod, "Specifier", "All routing key content after the first '.' delimiter" )
             .def( pybind11::init< const std::string& >(),
                   pybind11::arg( "unparsed" ) = "")
             .def( "parse", &dripline::specifier::parse, "parses the specifier and populates internal attributes", DL_BIND_CALL_GUARD_STREAMS )
diff --git a/setup.py b/setup.py
index efd4adee..6582c7a0 100644
--- a/setup.py
+++ b/setup.py
@@ -40,7 +40,7 @@ def build_extension(self, ext):
                      ]
 
         #cfg = 'Debug' if self.debug else 'Release'
-        cfg = 'DEBUG'
+        cfg = 'Release'
         build_args = ['--config', cfg]
 
         if platform.system() == "Windows":
diff --git a/tests/test_service.py b/tests/test_service.py
index 7b56b394..836d54de 100644
--- a/tests/test_service.py
+++ b/tests/test_service.py
@@ -7,6 +7,14 @@ def test_service_creation():
     a_service = dripline.core.Service(a_name, make_connection=False)
     assert(a_service.name == a_name)
 
+def test_cancelation():
+    a_service = dripline.core.Service("a_service", make_connection=False)
+    assert(not a_service.is_canceled())
+    a_sighand = scarab.SignalHandler(False)
+    a_sighand.add_cancelable(a_service)
+    a_sighand.cancel_all(0)
+    assert(a_service.is_canceled())
+
 def test_submit_request_message():
     a_name = "a_service"
     a_service = dripline.core.Service(a_name, make_connection=False)