diff --git a/pgvector/bit.py b/pgvector/bit.py
index 26a9d8d..eee4b9b 100644
--- a/pgvector/bit.py
+++ b/pgvector/bit.py
@@ -62,9 +62,12 @@ def from_binary(cls, value):
 
     @classmethod
     def _to_db(cls, value):
+        if value is None:
+            return value 
+        
         if not isinstance(value, cls):
-            raise ValueError('expected bit')
-
+            value = cls(value)
+        
         return value.to_text()
 
     @classmethod
diff --git a/pgvector/sqlalchemy/bit.py b/pgvector/sqlalchemy/bit.py
index 1ea85c3..fb7f026 100644
--- a/pgvector/sqlalchemy/bit.py
+++ b/pgvector/sqlalchemy/bit.py
@@ -1,6 +1,8 @@
+import asyncpg
+from sqlalchemy.dialects.postgresql.asyncpg import PGDialect_asyncpg
 from sqlalchemy.dialects.postgresql.base import ischema_names
 from sqlalchemy.types import UserDefinedType, Float
-
+from .. import Bit
 
 class BIT(UserDefinedType):
     cache_ok = True
@@ -24,7 +26,7 @@ def process(value):
                 return value
             return process
         else:
-            return super().bind_processor(dialect)
+            return lambda value: Bit._to_db(value)
 
     class comparator_factory(UserDefinedType.Comparator):
         def hamming_distance(self, other):
diff --git a/tests/test_sqlalchemy.py b/tests/test_sqlalchemy.py
index c59c12e..af34bee 100644
--- a/tests/test_sqlalchemy.py
+++ b/tests/test_sqlalchemy.py
@@ -311,6 +311,13 @@ def test_bit(self, engine):
             item = session.get(Item, 1)
             assert item.binary_embedding == '101'
 
+    def test_boolean_list_bit(self, engine):
+        with Session(engine) as session:
+            session.add(Item(id=1, binary_embedding=[True, False, True]))
+            session.commit()
+            item = session.get(Item, 1)
+            assert item.binary_embedding == '101'
+
     def test_bit_hamming_distance(self, engine):
         create_items()
         with Session(engine) as session:
@@ -567,7 +574,6 @@ def test_halfvec_array(self, engine):
             item = session.get(Item, 1)
             assert item.half_embeddings == [HalfVector([1, 2, 3]), HalfVector([4, 5, 6])]
 
-
 @pytest.mark.parametrize('engine', async_engines)
 class TestSqlalchemyAsync:
     def setup_method(self):