diff --git a/src/rabit_tracker.py b/src/rabit_tracker.py
index 910db18b1..7c5dfa1d2 100644
--- a/src/rabit_tracker.py
+++ b/src/rabit_tracker.py
@@ -121,7 +121,7 @@ class SlaveEntry:
             return rmset
     
 class Tracker:
-    def __init__(self, port = 9000, port_end = 9999):
+    def __init__(self, port = 9091, port_end = 9999):
         sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
         for port in range(port, port_end):
             try: