diff --git a/demo/pantheon/run_student.py b/demo/pantheon/run_student.py
index 19d9b20665a410f9f9e8c778aed1cfe66921d00d..b2ede92fe3e13bacbd6590845247c89e30e018ff 100644
--- a/demo/pantheon/run_student.py
+++ b/demo/pantheon/run_student.py
@@ -80,8 +80,8 @@ def run(args):
     student.start()
 
     if args.test_send_recv:
-        for t in xrange(2):
-            for i in xrange(3):
+        for t in range(2):
+            for i in range(3):
                 print(student.recv(t))
         student.send("message from student!")