diff --git a/app/apps/import_app/schemas/v1.py b/app/apps/import_app/schemas/v1.py
index f5710f6..07bb5e6 100644
--- a/app/apps/import_app/schemas/v1.py
+++ b/app/apps/import_app/schemas/v1.py
@@ -4,10 +4,8 @@ from pydantic import BaseModel, Field, model_validator, field_validator
 
 class CompareDeduplicationRule(BaseModel):
     type: Literal["compare"]
-    fields: Dict = Field(
-        ..., description="Match header and fields to compare for deduplication"
-    )
-    match_type: Literal["lax", "strict"]
+    fields: list[str] = Field(..., description="Compare fields for deduplication")
+    match_type: Literal["lax", "strict"] = "lax"
 
     @field_validator("fields", mode="before")
     def coerce_fields_to_dict(cls, v):
diff --git a/app/apps/import_app/services/v1.py b/app/apps/import_app/services/v1.py
index d49ef9a..e19886b 100644
--- a/app/apps/import_app/services/v1.py
+++ b/app/apps/import_app/services/v1.py
@@ -285,7 +285,7 @@ class ImportService:
                 query = Transaction.all_objects.all().values("id")
 
                 # Build query conditions for each field in the rule
-                for field, header in rule.fields.items():
+                for field in rule.fields:
                     if field in transaction_data:
                         if rule.match_type == "strict":
                             query = query.filter(**{field: transaction_data[field]})