diff --git a/libra/common/lbstats.py b/libra/common/lbstats.py
index 2c3d6b72..7b5b7f0e 100644
--- a/libra/common/lbstats.py
+++ b/libra/common/lbstats.py
@@ -20,8 +20,8 @@ class LBStatistics(object):
 
     def __init__(self):
         self.stats = {}
-        self.bytes_out = 0
-        self.bytes_in = 0
+        self.bytes_out = 0L
+        self.bytes_in = 0L
         self.utc_timestamp = datetime.datetime.utcnow()
 
     @property
@@ -30,8 +30,8 @@ class LBStatistics(object):
 
     @bytes_out.setter
     def bytes_out(self, value):
-        if not isinstance(value, int):
-            raise TypeError("Must be an integer: '%s'" % value)
+        if not isinstance(value, long):
+            raise TypeError("Must be a long integer: '%s'" % value)
         self.stats['bytes_out'] = value
 
     @property
@@ -40,8 +40,8 @@ class LBStatistics(object):
 
     @bytes_in.setter
     def bytes_in(self, value):
-        if not isinstance(value, int):
-            raise TypeError("Must be an integer: '%s'" % value)
+        if not isinstance(value, long):
+            raise TypeError("Must be a long integer: '%s'" % value)
         self.stats['bytes_in'] = value
 
     @property
diff --git a/libra/worker/drivers/haproxy/ubuntu_services.py b/libra/worker/drivers/haproxy/ubuntu_services.py
index 3bf65141..e0ca33d7 100644
--- a/libra/worker/drivers/haproxy/ubuntu_services.py
+++ b/libra/worker/drivers/haproxy/ubuntu_services.py
@@ -143,9 +143,9 @@ class UbuntuServices(ServicesBase):
         for row in reader:
             if row['pxname'] == proxy_name and row['svname'] == service_name:
                 if row['bout']:
-                    stats.bytes_out = int(row['bout'])
+                    stats.bytes_out = long(row['bout'])
                 if row['bin']:
-                    stats.bytes_in = int(row['bin'])
+                    stats.bytes_in = long(row['bin'])
                 break
 
         return stats
diff --git a/tests/test_lbstats.py b/tests/test_lbstats.py
index aab676b3..c53f38c2 100644
--- a/tests/test_lbstats.py
+++ b/tests/test_lbstats.py
@@ -12,23 +12,23 @@ class TestLBStatistics(unittest.TestCase):
 
     def testInitValues(self):
         now = datetime.datetime.utcnow()
-        self.assertEquals(self.stats.bytes_out, 0)
-        self.assertEquals(self.stats.bytes_in, 0)
         ts = self.stats.utc_timestamp
         self.assertEquals(ts.year, now.year)
         self.assertEquals(ts.month, now.month)
         self.assertEquals(ts.day, now.day)
         self.assertEquals(ts.hour, now.hour)
+        self.assertEquals(self.stats.bytes_out, 0L)
+        self.assertEquals(self.stats.bytes_in, 0L)
 
     def testSetBytesIn(self):
-        self.stats.bytes_in = 99
-        self.assertEquals(self.stats.bytes_in, 99)
+        self.stats.bytes_in = 99L
+        self.assertEquals(self.stats.bytes_in, 99L)
         with self.assertRaises(TypeError):
             self.stats.bytes_in = "NaN"
 
     def testSetBytesOut(self):
-        self.stats.bytes_out = 100
-        self.assertEquals(self.stats.bytes_out, 100)
+        self.stats.bytes_out = 100L
+        self.assertEquals(self.stats.bytes_out, 100L)
         with self.assertRaises(TypeError):
             self.stats.bytes_out = "NaN"