diff --git a/api/app.py b/api/app.py
index e0cccd6183..f5a6d40e1a 100644
--- a/api/app.py
+++ b/api/app.py
@@ -2,7 +2,7 @@ import os
 
 from configs import dify_config
 
-if not os.environ.get("DEBUG") or os.environ.get("DEBUG", "false").lower() != 'true':
+if os.environ.get("DEBUG", "false").lower() != 'true':
     from gevent import monkey
 
     monkey.patch_all()
@@ -43,6 +43,8 @@ from extensions import (
 from extensions.ext_database import db
 from extensions.ext_login import login_manager
 from libs.passport import PassportService
+
+# TODO: Find a way to avoid importing models here
 from models import account, dataset, model, source, task, tool, tools, web
 from services.account_service import AccountService
 
diff --git a/api/core/app/apps/workflow/app_generator.py b/api/core/app/apps/workflow/app_generator.py
index 3eb0bcf3da..0f547ca164 100644
--- a/api/core/app/apps/workflow/app_generator.py
+++ b/api/core/app/apps/workflow/app_generator.py
@@ -94,7 +94,6 @@ class WorkflowAppGenerator(BaseAppGenerator):
             application_generate_entity=application_generate_entity,
             invoke_from=invoke_from,
             stream=stream,
-            call_depth=call_depth,
         )
 
     def _generate(
@@ -104,7 +103,6 @@ class WorkflowAppGenerator(BaseAppGenerator):
         application_generate_entity: WorkflowAppGenerateEntity,
         invoke_from: InvokeFrom,
         stream: bool = True,
-        call_depth: int = 0
     ) -> Union[dict, Generator[dict, None, None]]:
         """
         Generate App response.
@@ -166,10 +164,10 @@ class WorkflowAppGenerator(BaseAppGenerator):
         """
         if not node_id:
             raise ValueError('node_id is required')
-        
+
         if args.get('inputs') is None:
             raise ValueError('inputs is required')
-        
+
         extras = {
             "auto_generate_conversation_name": False
         }
diff --git a/api/core/model_runtime/utils/_compat.py b/api/core/model_runtime/utils/_compat.py
deleted file mode 100644
index 5c34152751..0000000000
--- a/api/core/model_runtime/utils/_compat.py
+++ /dev/null
@@ -1,21 +0,0 @@
-from typing import Any, Literal
-
-from pydantic import BaseModel
-from pydantic.version import VERSION as PYDANTIC_VERSION
-
-PYDANTIC_V2 = PYDANTIC_VERSION.startswith("2.")
-
-if PYDANTIC_V2:
-    from pydantic_core import Url as Url
-
-    def _model_dump(
-        model: BaseModel, mode: Literal["json", "python"] = "json", **kwargs: Any
-    ) -> Any:
-        return model.model_dump(mode=mode, **kwargs)
-else:
-    from pydantic import AnyUrl as Url  # noqa: F401
-
-    def _model_dump(
-        model: BaseModel, mode: Literal["json", "python"] = "json", **kwargs: Any
-    ) -> Any:
-        return model.dict(**kwargs)
diff --git a/api/core/model_runtime/utils/encoders.py b/api/core/model_runtime/utils/encoders.py
index e41d49216c..5078f00bfa 100644
--- a/api/core/model_runtime/utils/encoders.py
+++ b/api/core/model_runtime/utils/encoders.py
@@ -8,16 +8,20 @@ from ipaddress import IPv4Address, IPv4Interface, IPv4Network, IPv6Address, IPv6
 from pathlib import Path, PurePath
 from re import Pattern
 from types import GeneratorType
-from typing import Any, Optional, Union
+from typing import Any, Literal, Optional, Union
 from uuid import UUID
 
 from pydantic import BaseModel
 from pydantic.networks import AnyUrl, NameEmail
 from pydantic.types import SecretBytes, SecretStr
+from pydantic_core import Url
 from pydantic_extra_types.color import Color
 
-from ._compat import PYDANTIC_V2, Url, _model_dump
 
+def _model_dump(
+    model: BaseModel, mode: Literal["json", "python"] = "json", **kwargs: Any
+) -> Any:
+    return model.model_dump(mode=mode, **kwargs)
 
 # Taken from Pydantic v1 as is
 def isoformat(o: Union[datetime.date, datetime.time]) -> str:
@@ -109,12 +113,6 @@ def jsonable_encoder(
                 if isinstance(obj, encoder_type):
                     return encoder_instance(obj)
     if isinstance(obj, BaseModel):
-        # TODO: remove when deprecating Pydantic v1
-        encoders: dict[Any, Any] = {}
-        if not PYDANTIC_V2:
-            encoders = getattr(obj.__config__, "json_encoders", {})  # type: ignore[attr-defined]
-            if custom_encoder:
-                encoders.update(custom_encoder)
         obj_dict = _model_dump(
             obj,
             mode="json",
@@ -131,8 +129,6 @@ def jsonable_encoder(
             obj_dict,
             exclude_none=exclude_none,
             exclude_defaults=exclude_defaults,
-            # TODO: remove when deprecating Pydantic v1
-            custom_encoder=encoders,
             sqlalchemy_safe=sqlalchemy_safe,
         )
     if dataclasses.is_dataclass(obj):