diff --git a/src/models/DeviceExcludeMode.js b/src/models/DeviceExcludeMode.js
index f00c6f4..781c5a9 100644
--- a/src/models/DeviceExcludeMode.js
+++ b/src/models/DeviceExcludeMode.js
@@ -1,4 +1,5 @@
 const DeviceExcludeMode = {
+    ZERO: Symbol("ZERO"),
     NINE: Symbol("NINE"),
     THREE: Symbol("THREE"),
     SIX: Symbol("SIX"),
diff --git a/src/workers/mongo_manager.js b/src/workers/mongo_manager.js
index 67343d6..4e91a2a 100644
--- a/src/workers/mongo_manager.js
+++ b/src/workers/mongo_manager.js
@@ -24,12 +24,14 @@ function formatDate(date) {
 
     return [year, month, day].join('-');
 }
-
+const config = {
+    connectTimeoutMS: 30000
+}
 class MongoManager {
     constructor() {
         //init mongoDb
         let uri = `mongodb://appointment:Rdv%402022@${MONGO_DB_URL}/appointment`
-        this.client = new MongoClient(uri)
+        this.client = new MongoClient(uri, config)
     }
 
     async connect() {