diff --git a/vnpy/trader/rqdata.py b/vnpy/trader/rqdata.py
index 9b573e0f..1e1b3209 100644
--- a/vnpy/trader/rqdata.py
+++ b/vnpy/trader/rqdata.py
@@ -12,7 +12,7 @@ from .object import BarData
 
 INTERVAL_VT2RQ = {
     Interval.MINUTE: "1m",
-    Interval.HOUR: "1h",
+    Interval.HOUR: "60m",
     Interval.DAILY: "1d",
 }