diff --git a/backend/service-authentication/config.js b/backend/service-authentication/config.js
index da5ca03..306b779 100644
--- a/backend/service-authentication/config.js
+++ b/backend/service-authentication/config.js
@@ -1,7 +1,8 @@
 const config = {
     // paramètres de connexion à la base de données
     mongodbDatabase: 'chat',
-    mongodbHost:     'mongodb://127.0.0.1:27017/',
+    mongodbHost:     'mongodb://mongodb-authentication:27017/',
+    // mongodbHost:     'mongodb://127.0.0.1:27017/',
     charset:       'utf8',
     mongodbLogin:  '',
     mongodbPassword: '',
diff --git a/backend/service-message/config.js b/backend/service-message/config.js
index 6689868..dbaa986 100644
--- a/backend/service-message/config.js
+++ b/backend/service-message/config.js
@@ -1,6 +1,7 @@
 const config = {
     mongodbDatabase: 'chat',
-    mongodbHost:     'mongodb://127.0.0.1:27020/',
+    mongodbHost:     'mongodb://mongodb-message:27017/',
+    // mongodbHost:     'mongodb://127.0.0.1:27020/',
     charset:       'utf8',
     mongodbLogin:  '',
     mongodbPassword: '',
diff --git a/backend/service-privateroom/config.js b/backend/service-privateroom/config.js
index dd1ff91..144b105 100644
--- a/backend/service-privateroom/config.js
+++ b/backend/service-privateroom/config.js
@@ -1,7 +1,7 @@
 const config = {
     mongodbDatabase: 'chat',
-    mongodbHost:     'mongodb://127.0.0.1:27021/',
-    // mongodbHost:     'mongodb://127.0.0.1:27018/', //when commit
+    mongodbHost:     'mongodb://mongodb-privateroom:27017',
+    // mongodbHost:     'mongodb://127.0.0.1:27021/',
     charset:       'utf8',
     mongodbLogin:  '',
     mongodbPassword: '',