diff --git a/pynamodb_encoder/decoder.py b/pynamodb_encoder/decoder.py
index 344b419..83601fc 100644
--- a/pynamodb_encoder/decoder.py
+++ b/pynamodb_encoder/decoder.py
@@ -43,7 +43,7 @@ def coerce(self, element_type: Union[Type[Attribute], None]) -> Attribute:
         return (element_type or Attribute)()
 
     def decode_map(self, attr: MapAttribute, data: Dict[str, Any]):
-        if type(attr) == MapAttribute:
+        if type(attr) is MapAttribute:
             return data
         elif isinstance(attr, DynamicMapAttribute):
             return self.decode_dynamic_map(attr, data)
diff --git a/pynamodb_encoder/encoder.py b/pynamodb_encoder/encoder.py
index 58dbed9..cf9c40e 100644
--- a/pynamodb_encoder/encoder.py
+++ b/pynamodb_encoder/encoder.py
@@ -37,7 +37,7 @@ def encode_list(self, attr: ListAttribute, data: List) -> List:
         return [self.encode_attribute(element_attr, value) for value in data]
 
     def encode_map(self, attr: MapAttribute, data: MapAttribute) -> Dict:
-        if type(attr) == MapAttribute:
+        if type(attr) is MapAttribute:
             return {name: data[name] for name in data}
         elif isinstance(attr, DynamicMapAttribute):
             return self.encode_dynamic_map(attr, data)