diff --git a/gokart/task.py b/gokart/task.py
index 9f30d0b8..7996c9c1 100644
--- a/gokart/task.py
+++ b/gokart/task.py
@@ -1,6 +1,7 @@
 import hashlib
 import inspect
 import os
+import random
 import types
 from importlib import import_module
 from logging import getLogger
@@ -86,6 +87,10 @@ class TaskOnKart(luigi.Task):
     )
     should_lock_run: bool = ExplicitBoolParameter(default=False, significant=False, description='Whether to use redis lock or not at task run.')
 
+    @property
+    def priority(self):
+        return random.Random().random()  # seed is fixed, so we need to use random.Random().random() instead f random.random()
+
     def __init__(self, *args, **kwargs):
         self._add_configuration(kwargs, 'TaskOnKart')
         # 'This parameter is dumped into "workspace_directory/log/task_log/" when this task finishes with success.'