diff --git a/common/args.py b/common/args.py
index 0a888af..b991103 100644
--- a/common/args.py
+++ b/common/args.py
@@ -1,8 +1,7 @@
 """Argparser for overriding config values"""
 
 import argparse
-from typing import Any, Type, get_origin, get_args, Union, List
-from inspect import get_annotations, isclass
+from typing import Any, get_origin, get_args, Union, List
 
 from pydantic import BaseModel
 
@@ -42,6 +41,7 @@ def map_pydantic_type_to_argparse(pydantic_type: Any):
     Maps Pydantic types to argparse compatible types.
     Handles special cases like Union and List.
     """
+
     origin = get_origin(pydantic_type)
 
     # Handle optional types
@@ -65,6 +65,7 @@ def add_field_to_group(group, field_name, field_type, field) -> None:
     """
     Adds a Pydantic field to an argparse argument group.
     """
+
     arg_type = map_pydantic_type_to_argparse(field_type)
     help_text = field.description if field.description else "No description available"
 
@@ -75,23 +76,26 @@ def init_argparser() -> argparse.ArgumentParser:
     """
     Initializes an argparse parser based on a Pydantic config schema.
     """
+
     parser = argparse.ArgumentParser(description="TabbyAPI server")
 
-    field_type: Union[Type[BaseModel], Any]
-
     # Loop through each top-level field in the config
-    for field_name, field_type in get_annotations(TabbyConfigModel).items():
+    for field_name, field_info in TabbyConfigModel.model_fields.items():
+        field_type = field_info.annotation
         group = parser.add_argument_group(
             field_name, description=f"Arguments for {field_name}"
         )
 
         # Check if the field_type is a Pydantic model
-        if isclass(field_type):
-            for sub_field_name, sub_field_type in get_annotations(field_type).items():
-                field = field_type.model_fields[sub_field_name]
-                add_field_to_group(group, sub_field_name, sub_field_type, field)
+        if issubclass(field_type, BaseModel):
+            for sub_field_name, sub_field_info in field_type.model_fields.items():
+                sub_field_name = sub_field_name.replace("_", "-")
+                sub_field_type = sub_field_info.annotation
+                add_field_to_group(
+                    group, sub_field_name, sub_field_type, sub_field_info
+                )
         else:
-            # Handle cases where the field_type is not a Pydantic mode
+            field_name = field_name.replace("_", "-")
             arg_type = map_pydantic_type_to_argparse(field_type)
             group.add_argument(
                 f"--{field_name}", type=arg_type, help=f"Argument for {field_name}"
diff --git a/common/config_models.py b/common/config_models.py
index 5e5b5a2..ced18f9 100644
--- a/common/config_models.py
+++ b/common/config_models.py
@@ -4,7 +4,7 @@ from typing import List, Optional, Union
 from common.utils import unwrap
 
 
-class ConfigConfig(BaseModel):
+class ConfigOverrideConfig(BaseModel):
     config: Optional[str] = Field(
         None, description=("Path to an overriding config.yml file")
     )
@@ -279,7 +279,9 @@ class EmbeddingsConfig(BaseModel):
 
 
 class TabbyConfigModel(BaseModel):
-    config: ConfigConfig = Field(default_factory=ConfigConfig.model_construct)
+    config: ConfigOverrideConfig = Field(
+        default_factory=ConfigOverrideConfig.model_construct
+    )
     network: NetworkConfig = Field(default_factory=NetworkConfig.model_construct)
     logging: LoggingConfig = Field(default_factory=LoggingConfig.model_construct)
     model: ModelConfig = Field(default_factory=ModelConfig.model_construct)