diff --git a/src/dflow/__init__.py b/src/dflow/__init__.py
index ffa2a6e0..28e5c233 100644
--- a/src/dflow/__init__.py
+++ b/src/dflow/__init__.py
@@ -5,6 +5,7 @@
 from .code_gen import gen_code
 from .common import (CustomArtifact, LineageClient, LocalArtifact, S3Artifact,
                      import_func)
+from .common import jsonpickle
 from .config import config, s3_config, set_config, set_s3_config
 from .context import Context
 from .dag import DAG
@@ -44,7 +45,7 @@
            "LineageClient", "Secret", "query_workflows",
            "query_archived_workflows", "ContainerExecutor", "ArgoStep",
            "ArgoWorkflow", "argo_enumerate", "path_object_of_artifact",
-           "CustomArtifact", "gen_code"]
+           "CustomArtifact", "gen_code", "jsonpickle"]
 
 
 if os.environ.get("DFLOW_LINEAGE"):
diff --git a/src/dflow/argo_objects.py b/src/dflow/argo_objects.py
index e5e6c6a0..c847ceb6 100644
--- a/src/dflow/argo_objects.py
+++ b/src/dflow/argo_objects.py
@@ -8,8 +8,7 @@
 from copy import deepcopy
 from typing import Any, List, Union
 
-import jsonpickle
-
+from .common import jsonpickle
 from .config import config, s3_config
 from .io import S3Artifact
 from .op_template import get_k8s_client
diff --git a/src/dflow/code_gen.py b/src/dflow/code_gen.py
index 97189ac3..7a7dd20d 100644
--- a/src/dflow/code_gen.py
+++ b/src/dflow/code_gen.py
@@ -1,13 +1,12 @@
 import inspect
 import json
 
-import jsonpickle
-
 from .common import (input_artifact_pattern, input_parameter_pattern,
                      step_output_artifact_pattern,
                      step_output_parameter_pattern,
                      task_output_artifact_pattern,
                      task_output_parameter_pattern)
+from .common import jsonpickle
 from .config import config
 from .dag import DAG
 from .io import InputArtifact, InputParameter, OutputArtifact, OutputParameter
@@ -118,7 +117,7 @@ def render_steps(self, var_name, template):
                                 "%s.outputs.parameters['%s']" % (
                                     step_dict[match.group(1)], match.group(2)))
                     elif isinstance(par, dict) and "py/object" in par:
-                        self.imports.add((None, "jsonpickle"))
+                        self.imports.add(("dflow", "jsonpickle"))
                         kwargs["parameters"][name] = Variable(
                             "jsonpickle.loads(%s)" % repr(json.dumps(par)))
                 for name, art in kwargs.get("artifacts", {}).items():
@@ -254,7 +253,7 @@ def render_dag(self, var_name, template):
                                 task_dict[match.group(1)], match.group(2)))
                         dependencies_dict[task["name"]].append(match.group(1))
                 elif isinstance(par, dict) and "py/object" in par:
-                    self.imports.add((None, "jsonpickle"))
+                    self.imports.add(("dflow", "jsonpickle"))
                     kwargs["parameters"][name] = Variable(
                         "jsonpickle.loads(%s)" % repr(json.dumps(par)))
             for name, art in kwargs.get("artifacts", {}).items():
diff --git a/src/dflow/common.py b/src/dflow/common.py
index d498201d..f228ece6 100644
--- a/src/dflow/common.py
+++ b/src/dflow/common.py
@@ -8,7 +8,7 @@
 from importlib import import_module
 from typing import Any, Dict, List, Union
 
-import jsonpickle
+import jsonpickle as jp
 
 from .config import config as global_config
 from .config import s3_config
@@ -45,7 +45,7 @@
     r"^{{tasks\.(.*?)\.outputs\.artifacts\.(.*?)}}$")
 
 
-class CustomHandler(jsonpickle.handlers.BaseHandler):
+class CustomHandler(jp.handlers.BaseHandler):
     def flatten(self, obj, data):
         data.update(obj.to_dict())
         return data
@@ -253,3 +253,16 @@ def download(self, name: str, path: str):
 
     def render(self, template, name: str):
         return template
+
+
+class CustomPickler:
+    __path__ = jp.__path__
+
+    def dumps(self, obj, **kwargs):
+        return jp.dumps(obj, keys=True, **kwargs)
+
+    def loads(self, s, **kwargs):
+        return jp.loads(s, keys=True, **kwargs)
+
+
+jsonpickle = CustomPickler()
diff --git a/src/dflow/io.py b/src/dflow/io.py
index 8848bc99..80e9a3fc 100644
--- a/src/dflow/io.py
+++ b/src/dflow/io.py
@@ -4,10 +4,8 @@
 from copy import copy, deepcopy
 from typing import Any, Dict, List, Optional, Union
 
-import jsonpickle
-
-from .common import (CustomArtifact, LocalArtifact, S3Artifact, param_errmsg,
-                     param_regex)
+from .common import (CustomArtifact, LocalArtifact, S3Artifact, jsonpickle,
+                     param_errmsg, param_regex)
 from .config import config
 from .utils import randstr, s3_config, upload_s3
 
diff --git a/src/dflow/python/opio.py b/src/dflow/python/opio.py
index de9b1ec6..c5acff51 100644
--- a/src/dflow/python/opio.py
+++ b/src/dflow/python/opio.py
@@ -3,9 +3,7 @@
 from pathlib import Path
 from typing import Any, Dict, List, Optional, Set, Union
 
-import jsonpickle
-
-from ..common import CustomHandler, S3Artifact
+from ..common import CustomHandler, S3Artifact, jsonpickle
 from ..config import config
 from ..io import PVC, type_to_str
 
diff --git a/src/dflow/python/python_op_template.py b/src/dflow/python/python_op_template.py
index 509b12f4..3bd32282 100644
--- a/src/dflow/python/python_op_template.py
+++ b/src/dflow/python/python_op_template.py
@@ -4,10 +4,8 @@
 from pathlib import Path
 from typing import Any, Dict, List, Optional, Type, Union
 
-import jsonpickle
-
 from .. import __path__
-from ..common import S3Artifact
+from ..common import S3Artifact, jsonpickle
 from ..config import config
 from ..io import (PVC, InputArtifact, InputParameter, Inputs, OutputArtifact,
                   OutputParameter, Outputs)
@@ -449,8 +447,8 @@ def render_script(self):
             script += handle_packages_script(
                 "%s/inputs/artifacts/dflow_python_packages" % self.tmp_root)
 
-        script += "import json, jsonpickle\n"
-        script += "from dflow import config, s3_config\n"
+        script += "import json\n"
+        script += "from dflow import config, jsonpickle, s3_config\n"
         script += "config.update(jsonpickle.loads(r'''%s'''))\n" % \
             jsonpickle.dumps(config)
         script += "s3_config.update(jsonpickle.loads(r'''%s'''))\n" % \
@@ -483,7 +481,7 @@ def render_script(self):
                     script += "%s = cloudpickle.loads(%s)\n" % \
                         (class_name, cloudpickle.dumps(op_class))
 
-        script += "import os, sys, traceback, jsonpickle\n"
+        script += "import os, sys, traceback\n"
         script += "from dflow.python import OPIO, TransientError, FatalError\n"
         script += "from dflow.python.utils import handle_input_artifact," \
                   " handle_input_parameter\n"
diff --git a/src/dflow/python/utils.py b/src/dflow/python/utils.py
index 788970f1..702a347a 100644
--- a/src/dflow/python/utils.py
+++ b/src/dflow/python/utils.py
@@ -5,8 +5,7 @@
 from pathlib import Path
 from typing import Dict, List, Set
 
-import jsonpickle
-
+from ..common import jsonpickle
 from ..config import config
 from ..utils import (artifact_classes, assemble_path_object,
                      convert_dflow_list, copy_file, expand, flatten, randstr,
diff --git a/src/dflow/step.py b/src/dflow/step.py
index e2659340..2b59fc2d 100644
--- a/src/dflow/step.py
+++ b/src/dflow/step.py
@@ -10,10 +10,9 @@
 from copy import copy, deepcopy
 from typing import Any, Dict, List, Optional, Union
 
-import jsonpickle
-
 from .common import (CustomArtifact, HTTPArtifact, LocalArtifact, S3Artifact,
-                     field_errmsg, field_regex, key_errmsg, key_regex)
+                     field_errmsg, field_regex, jsonpickle, key_errmsg,
+                     key_regex)
 from .config import config, s3_config
 from .context_syntax import GLOBAL_CONTEXT
 from .executor import Executor
diff --git a/src/dflow/util_ops.py b/src/dflow/util_ops.py
index a12daedb..fd81d36a 100644
--- a/src/dflow/util_ops.py
+++ b/src/dflow/util_ops.py
@@ -1,7 +1,5 @@
-import jsonpickle
-
 from . import __path__
-from .common import S3Artifact
+from .common import S3Artifact, jsonpickle
 from .config import config
 from .io import (InputArtifact, InputParameter, Inputs, OutputArtifact,
                  OutputParameter)
diff --git a/src/dflow/utils.py b/src/dflow/utils.py
index db08d2b3..e9902236 100644
--- a/src/dflow/utils.py
+++ b/src/dflow/utils.py
@@ -21,9 +21,7 @@
 from pathlib import Path, PosixPath, WindowsPath
 from typing import Dict, List, Optional, Set, Tuple, Union
 
-import jsonpickle
-
-from .common import LocalArtifact, S3Artifact
+from .common import LocalArtifact, S3Artifact, jsonpickle
 from .config import config, s3_config
 
 try:
diff --git a/src/dflow/workflow.py b/src/dflow/workflow.py
index 5550a461..9b3bb45b 100644
--- a/src/dflow/workflow.py
+++ b/src/dflow/workflow.py
@@ -6,10 +6,8 @@
 from copy import deepcopy
 from typing import Any, Dict, List, Optional, Union
 
-import jsonpickle
-
 from .argo_objects import ArgoStep, ArgoWorkflow
-from .common import subdomain_errmsg, subdomain_regex
+from .common import jsonpickle, subdomain_errmsg, subdomain_regex
 from .config import config, s3_config
 from .context import Context
 from .context_syntax import GLOBAL_CONTEXT