diff --git a/capa/features/freeze/__init__.py b/capa/features/freeze/__init__.py
index 8bbc4dc55..7af642f6a 100644
--- a/capa/features/freeze/__init__.py
+++ b/capa/features/freeze/__init__.py
@@ -334,9 +334,7 @@ class DynamicFeatures(BaseModel):
     global_: Tuple[GlobalFeature, ...] = Field(alias="global")
     file: Tuple[FileFeature, ...]
     processes: Tuple[ProcessFeatures, ...]
-
-    class Config:
-        allow_population_by_field_name = True
+    model_config = ConfigDict(populate_by_name=True)
 
 
 Features: TypeAlias = Union[StaticFeatures, DynamicFeatures]