diff --git a/llama_stack/providers/utils/kvstore/config.py b/llama_stack/providers/utils/kvstore/config.py
index 5829650d6..b2f56b885 100644
--- a/llama_stack/providers/utils/kvstore/config.py
+++ b/llama_stack/providers/utils/kvstore/config.py
@@ -4,12 +4,12 @@
 # This source code is licensed under the terms described in the LICENSE file in
 # the root directory of this source tree.
 
+import re
 from enum import Enum
 from typing import Literal, Optional, Union
 
 from pydantic import BaseModel, Field, field_validator
 from typing_extensions import Annotated
-import re
 
 from llama_stack.distribution.utils.config_dirs import RUNTIME_BASE_DIR
 
@@ -54,17 +54,19 @@ class PostgresKVStoreConfig(CommonConfig):
     password: Optional[str] = None
     table_name: str = "llamastack_kvstore"
 
-    @field_validator('table_name')
-    def validate_table_name(cls, v: str) -> str:
+    @field_validator("table_name")
+    def validate_table_name(self, v: str) -> str:
         # PostgreSQL identifiers rules:
         # - Must start with a letter or underscore
         # - Can contain letters, numbers, and underscores
         # - Maximum length is 63 bytes
-        pattern = r'^[a-zA-Z_][a-zA-Z0-9_]*$'
+        pattern = r"^[a-zA-Z_][a-zA-Z0-9_]*$"
         if not re.match(pattern, v):
-            raise ValueError('Invalid table name. Must start with letter or underscore and contain only letters, numbers, and underscores')
+            raise ValueError(
+                "Invalid table name. Must start with letter or underscore and contain only letters, numbers, and underscores"
+            )
         if len(v) > 63:
-            raise ValueError('Table name must be less than 63 characters')
+            raise ValueError("Table name must be less than 63 characters")
         return v