diff --git a/evm_trace/base.py b/evm_trace/base.py
index 60382b0..0af1158 100644
--- a/evm_trace/base.py
+++ b/evm_trace/base.py
@@ -15,8 +15,8 @@ class TraceFrame(BaseModel):
     gas: int
     gas_cost: int = Field(alias="gasCost")
     depth: int
-    stack: List[HexBytes]
-    memory: List[HexBytes]
+    stack: List[HexBytes] = []
+    memory: List[HexBytes] = []
     storage: Dict[HexBytes, HexBytes] = {}
 
 
@@ -25,8 +25,8 @@ class CallTreeNode(BaseModel):
     address: HexBytes = HexBytes("")
     value: int = 0
     depth: int = 0
-    gas_limit: Optional[int]
-    gas_cost: Optional[int]  # calculated from call starting and return
+    gas_limit: Optional[int] = None
+    gas_cost: Optional[int] = None  # calculated from call starting and return
     calldata: HexBytes = HexBytes("")
     returndata: HexBytes = HexBytes("")
     calls: List["CallTreeNode"] = []
diff --git a/tests/test_trace_frame.py b/tests/test_trace_frame.py
index cd22699..68c6c4f 100644
--- a/tests/test_trace_frame.py
+++ b/tests/test_trace_frame.py
@@ -9,6 +9,11 @@ def test_trace_frame_validation_passes(trace_frame_data):
     assert frame
 
 
+def test_trace_no_memory():
+    raw_frame = {"pc": 0, "op": "PUSH1", "gas": 4732305, "gasCost": 3, "depth": 1, "stack": []}
+    assert TraceFrame(**raw_frame)
+
+
 @pytest.mark.parametrize(
     "test_data",
     (