diff --git a/README.md b/README.md
index 416cf6c..d2c268f 100644
--- a/README.md
+++ b/README.md
@@ -8,6 +8,10 @@ Each item consists in :
 -   a **key** : the key of the configuration item (a string)
 -   a **value** : the value of the configuration item (always a string, each service must cast the value if needed)
 
+This service centralizes the configuration items, but theoratically each service should "push" its items toward the configuration service.
+
+Practically, it's the other way round as it's easier to use this configuration service as the single source of truth. This is why configuration items key and domain are immutable : services may use hardcoded domain-key pairs. Therefore, only values can be updated.
+
 ## Available domains
 
 -   **USER** : user related configuration item
@@ -85,7 +89,7 @@ The app exposes the following [gRPC](https://grpc.io/) services :
     }
     ```
 
--   **Update** : update a configuration item
+-   **Update** : update a configuration item value
 
     ```json
     {
diff --git a/src/modules/configuration/adapters/secondaries/configuration-messager.presenter.ts b/src/modules/configuration/adapters/secondaries/configuration-messager.presenter.ts
new file mode 100644
index 0000000..7c6836b
--- /dev/null
+++ b/src/modules/configuration/adapters/secondaries/configuration-messager.presenter.ts
@@ -0,0 +1,13 @@
+import { AutoMap } from '@automapper/classes';
+import { Domain } from '../../domain/dtos/domain.enum';
+
+export class ConfigurationMessagerPresenter {
+  @AutoMap()
+  domain: Domain;
+
+  @AutoMap()
+  key: string;
+
+  @AutoMap()
+  value: string;
+}
diff --git a/src/modules/configuration/domain/usecases/create-configuration.usecase.ts b/src/modules/configuration/domain/usecases/create-configuration.usecase.ts
index 000a463..171d33a 100644
--- a/src/modules/configuration/domain/usecases/create-configuration.usecase.ts
+++ b/src/modules/configuration/domain/usecases/create-configuration.usecase.ts
@@ -1,6 +1,7 @@
 import { Mapper } from '@automapper/core';
 import { InjectMapper } from '@automapper/nestjs';
 import { CommandHandler } from '@nestjs/cqrs';
+import { ConfigurationMessagerPresenter } from '../../adapters/secondaries/configuration-messager.presenter';
 import { ConfigurationMessager } from '../../adapters/secondaries/configuration.messager';
 import { ConfigurationRepository } from '../../adapters/secondaries/configuration.repository';
 import { LoggingMessager } from '../../adapters/secondaries/logging.messager';
@@ -28,7 +29,13 @@ export class CreateConfigurationUseCase {
       const configuration = await this._repository.create(entity);
       this._configurationMessager.publish(
         'create',
-        JSON.stringify(configuration),
+        JSON.stringify(
+          this._mapper.map(
+            configuration,
+            Configuration,
+            ConfigurationMessagerPresenter,
+          ),
+        ),
       );
       this._loggingMessager.publish(
         'configuration.create.info',
diff --git a/src/modules/configuration/domain/usecases/update-configuration.usecase.ts b/src/modules/configuration/domain/usecases/update-configuration.usecase.ts
index 34a8d83..f217d9b 100644
--- a/src/modules/configuration/domain/usecases/update-configuration.usecase.ts
+++ b/src/modules/configuration/domain/usecases/update-configuration.usecase.ts
@@ -1,6 +1,7 @@
 import { Mapper } from '@automapper/core';
 import { InjectMapper } from '@automapper/nestjs';
 import { CommandHandler } from '@nestjs/cqrs';
+import { ConfigurationMessagerPresenter } from '../../adapters/secondaries/configuration-messager.presenter';
 import { ConfigurationMessager } from '../../adapters/secondaries/configuration.messager';
 import { ConfigurationRepository } from '../../adapters/secondaries/configuration.repository';
 import { LoggingMessager } from '../../adapters/secondaries/logging.messager';
@@ -31,7 +32,13 @@ export class UpdateConfigurationUseCase {
       );
       this._configurationMessager.publish(
         'update',
-        JSON.stringify(command.updateConfigurationRequest),
+        JSON.stringify(
+          this._mapper.map(
+            configuration,
+            Configuration,
+            ConfigurationMessagerPresenter,
+          ),
+        ),
       );
       this._loggingMessager.publish(
         'configuration.update.info',
diff --git a/src/modules/configuration/mappers/configuration.profile.ts b/src/modules/configuration/mappers/configuration.profile.ts
index 374b862..90c8322 100644
--- a/src/modules/configuration/mappers/configuration.profile.ts
+++ b/src/modules/configuration/mappers/configuration.profile.ts
@@ -2,6 +2,7 @@ import { createMap, forMember, ignore, Mapper } from '@automapper/core';
 import { AutomapperProfile, InjectMapper } from '@automapper/nestjs';
 import { Injectable } from '@nestjs/common';
 import { ConfigurationPresenter } from '../adapters/primaries/configuration.presenter';
+import { ConfigurationMessagerPresenter } from '../adapters/secondaries/configuration-messager.presenter';
 import { CreateConfigurationRequest } from '../domain/dtos/create-configuration.request';
 import { UpdateConfigurationRequest } from '../domain/dtos/update-configuration.request';
 import { Configuration } from '../domain/entities/configuration';
@@ -24,6 +25,8 @@ export class ConfigurationProfile extends AutomapperProfile {
         Configuration,
         forMember((dest) => dest.uuid, ignore()),
       );
+
+      createMap(mapper, Configuration, ConfigurationMessagerPresenter);
     };
   }
 }