diff --git a/docs/json_schemas/fiveg_f1/v0/provider.json b/docs/json_schemas/fiveg_f1/v0/provider.json
index c1a4ec3d..ba1f8513 100644
--- a/docs/json_schemas/fiveg_f1/v0/provider.json
+++ b/docs/json_schemas/fiveg_f1/v0/provider.json
@@ -38,6 +38,7 @@
           "items": {
             "$ref": "#/$defs/PLMNConfig"
           },
+          "minItems": 1,
           "title": "Plmns",
           "type": "array"
         }
diff --git a/interfaces/fiveg_f1/v0/schema.py b/interfaces/fiveg_f1/v0/schema.py
index d783c2e5..adf1f720 100644
--- a/interfaces/fiveg_f1/v0/schema.py
+++ b/interfaces/fiveg_f1/v0/schema.py
@@ -25,10 +25,10 @@
         }
 """
 
-from pydantic import BaseModel, IPvAnyAddress, Field
+from pydantic import BaseModel, IPvAnyAddress, Field, conlist
 from dataclasses import dataclass
 from interface_tester.schema_base import DataBagSchema
-from typing import List, Optional, conlist
+from typing import List, Optional
 
 @dataclass
 class PLMNConfig: