diff --git a/src/server.py b/src/server.py
--- a/src/server.py
+++ b/src/server.py
@@ -111,13 +111,13 @@ class Server:
 
 		return True
 
-	def _requestHash(self,index):
-		log.info("received request for node #{0}".format(index))
-		assert index<len(self._tree.store)
-		nodeHash=self._tree.store[index]
+	def _requestHash(self,indices):
+		log.info("received request for nodes #{0}".format(",".join(str(i) for i in indices)))
+		assert all(i<len(self._tree.store) for i in indices)
+		hashes=[self._tree.store[i] for i in indices]
 
-		jsonResponse={"command":"send", "index":index, "dataType":"hash"}
-		binResponse=nodeHash
+		jsonResponse={"command":"send", "index":indices, "dataType":"hash"}
+		binResponse=b"".join(hashes)
 
 		return (jsonResponse,binResponse)