diff --git a/neutron_taas/db/taas_db.py b/neutron_taas/db/taas_db.py
index f4b09ab..2625511 100755
--- a/neutron_taas/db/taas_db.py
+++ b/neutron_taas/db/taas_db.py
@@ -216,3 +216,19 @@ class Tass_db_Mixin(taas.TaasPluginBase, base_db.CommonDbMixin):
             port = self._core_plugin().get_port(context, port_id)
 
         return port
+
+    def update_tap_service(self, context, id, tap_service):
+        LOG.debug("update_tap_service() called")
+        t_s = tap_service['tap_service']
+        with context.session.begin(subtransactions=True):
+            tap_service_db = self._get_tap_service(context, id)
+            tap_service_db.update(t_s)
+        return self._make_tap_service_dict(tap_service_db)
+
+    def update_tap_flow(self, context, id, tap_flow):
+        LOG.debug("update_tap_flow() called")
+        t_f = tap_flow['tap_flow']
+        with context.session.begin(subtransactions=True):
+            tap_flow_db = self._get_tap_flow(context, id)
+            tap_flow_db.update(t_f)
+        return self._make_tap_flow_dict(tap_flow_db)
diff --git a/neutron_taas/extensions/taas.py b/neutron_taas/extensions/taas.py
index ffe64ba..2abccac 100644
--- a/neutron_taas/extensions/taas.py
+++ b/neutron_taas/extensions/taas.py
@@ -238,6 +238,11 @@ class TaasPluginBase(service_base.ServicePluginBase):
         """List all Tap Services."""
         pass
 
+    @abc.abstractmethod
+    def update_tap_service(self, context, id, tap_service):
+        """Update a Tap Service."""
+        pass
+
     @abc.abstractmethod
     def create_tap_flow(self, context, tap_flow):
         """Create a Tap Flow."""
@@ -259,3 +264,8 @@ class TaasPluginBase(service_base.ServicePluginBase):
                       page_reverse=False):
         """List all Tap Flows."""
         pass
+
+    @abc.abstractmethod
+    def update_tap_flow(self, context, id, tap_flow):
+        """Update a Tap Flow."""
+        pass