diff --git a/mev_inspect/schemas/blocks.py b/mev_inspect/schemas/blocks.py
index 5ad16f2..d26e8a6 100644
--- a/mev_inspect/schemas/blocks.py
+++ b/mev_inspect/schemas/blocks.py
@@ -1,6 +1,8 @@
 from enum import Enum
 from typing import Dict, List, Optional
 
+from pydantic import BaseModel
+
 from .utils import CamelModel, Web3Model
 
 
@@ -36,3 +38,11 @@ class Block(Web3Model):
 
     def get_filtered_traces(self, hash: str) -> List[Trace]:
         return [trace for trace in self.traces if trace.transaction_hash == hash]
+
+
+class NestedTrace(BaseModel):
+    trace: Trace
+    subtraces: List["NestedTrace"]
+
+
+NestedTrace.update_forward_refs()