diff --git a/langchain_benchmarks/schema.py b/langchain_benchmarks/schema.py
index c135e10b..7d82edbe 100644
--- a/langchain_benchmarks/schema.py
+++ b/langchain_benchmarks/schema.py
@@ -4,6 +4,7 @@
 import dataclasses
 import importlib
 import urllib
+import warnings
 from typing import Any, Callable, Dict, Iterable, List, Optional, Sequence, Type, Union
 
 from langchain.prompts import ChatPromptTemplate
@@ -214,15 +215,26 @@ def _repr_html_(self) -> str:
 
     def filter(
         self,
-        Type: Optional[str],
+        *,
+        type: Optional[str] = None,
         dataset_id: Optional[str] = None,
         name: Optional[str] = None,
         description: Optional[str] = None,
+        Type: Optional[str] = None,  # For backwards compatibility:
     ) -> Registry:
         """Filter the tasks in the registry."""
         tasks = self.tasks
-        if Type is not None:
-            tasks = [task for task in tasks if task.__class__.__name__ == Type]
+        if Type and type:
+            raise ValueError("Cannot filter by both Type and type.")
+
+        if Type is not None and type is None:
+            type_ = Type
+            warnings.warn("Type is deprecated, please use type instead.")
+        else:
+            type_ = type
+
+        if type_ is not None:
+            tasks = [task for task in tasks if task.__class__.__name__ == type]
         if dataset_id is not None:
             tasks = [task for task in tasks if task.dataset_id == dataset_id]
         if name is not None: