diff --git a/src/netnode.py b/src/netnode.py
--- a/src/netnode.py
+++ b/src/netnode.py
@@ -49,6 +49,5 @@ class NetNode:
 
 	def _updateTree(self):
 		log.info("updating hash tree...")
-		for (k,v) in self._newLeaves.items():
-			self._tree.updateLeaf(k, v)
+		self._tree.batchUpdate(self._newLeaves.items())
 		self._tree.save(self._treeFile)