diff --git a/dbService.py b/dbService.py
index 19195ed..7833a09 100644
--- a/dbService.py
+++ b/dbService.py
@@ -93,8 +93,9 @@ class NodeDbService:
         return await c.to_list()
 
 class PacketDbService:
-    def __init__(self, dbStore):
+    def __init__(self, dbStore, core):
         self.dbStore:AsyncDatabase = dbStore
+        self.core = core
 
     async def findPacketsSignals(self,
                                 after: float = -1, 
@@ -175,7 +176,7 @@ class PacketDbService:
         return [PacketGroup(p, packetsPerNode, packetsSumNode) for p in l]
         
 class DbService(NodeDbService, PacketDbService):
-    def __init__(self, dbStore):
-        NodeDbService.__init__(self, dbStore)
-        PacketDbService.__init__(self, dbStore)
+    def __init__(self, dbStore, core):
+        NodeDbService.__init__(self, dbStore, core)
+        PacketDbService.__init__(self, dbStore, core)
     
\ No newline at end of file
diff --git a/service.py b/service.py
index 993bcaa..9aafa81 100644
--- a/service.py
+++ b/service.py
@@ -163,7 +163,7 @@ class MongoDriver(MeshArgsParse):
             logger.error("Unknown mongo client")
             sys.exit(1)
         self.dbStore = self.dbClient[self.args.mongo_db]
-        self.dbService = DbService(self.dbStore)
+        self.dbService = DbService(self.dbStore, self)
         
         from tileManager import TileManager
         self.tileManager = TileManager(self)