diff --git a/lib/dl_core/dl_core_tests/unit/test_json_serializer.py b/lib/dl_core/dl_core_tests/unit/test_json_serializer.py
index 8c196533e..d94854693 100644
--- a/lib/dl_core/dl_core_tests/unit/test_json_serializer.py
+++ b/lib/dl_core/dl_core_tests/unit/test_json_serializer.py
@@ -26,7 +26,7 @@
     some_timedelta=datetime.timedelta(seconds=1320.0231),
     some_decimal=decimal.Decimal("12345" * 9 + "." + "54321" * 9),
     some_uuid=uuid.UUID("12345678123456781234567812345678"),
-    # some_bytes=b"Another one bites",  TODO: currently not serializable
+    some_bytes=b"Another one bites",
 )
 
 
@@ -47,7 +47,7 @@
         "value": "123451234512345123451234512345123451234512345.543215432154321543215432154321543215432154321",
     },
     some_uuid={"__dl_type__": "uuid", "value": "12345678-1234-5678-1234-567812345678"},
-    # some_bytes=b"Another one bites",
+    some_bytes={"__dl_type__": "bytes", "value": "QW5vdGhlciBvbmUgYml0ZXM="},
 )
 
 
@@ -61,9 +61,7 @@ def test_json_serialization():
 
 
 def test_json_tricky_serialization():
-    data = SAMPLE_DATA
-    dumped = json.dumps(data, cls=RedisDatalensDataJSONEncoder)
-    tricky_data = dict(normal=data, abnormal=json.loads(dumped))
+    tricky_data = dict(normal=SAMPLE_DATA, abnormal=EXPECTED_DUMP)
     tricky_data_dumped = json.dumps(tricky_data, cls=RedisDatalensDataJSONEncoder)
     tricky_roundtrip = json.loads(tricky_data_dumped, cls=RedisDatalensDataJSONDecoder)
     assert tricky_roundtrip["normal"] == tricky_data["normal"], tricky_roundtrip
diff --git a/lib/dl_model_tools/dl_model_tools/serialization.py b/lib/dl_model_tools/dl_model_tools/serialization.py
index 2da25d82d..b9693f83a 100644
--- a/lib/dl_model_tools/dl_model_tools/serialization.py
+++ b/lib/dl_model_tools/dl_model_tools/serialization.py
@@ -7,6 +7,7 @@
 from __future__ import annotations
 
 import abc
+import base64
 import datetime
 import decimal
 import json
@@ -152,6 +153,19 @@ def from_jsonable(value: TJSONLike) -> uuid.UUID:
         return uuid.UUID(value)
 
 
+class BytesSerializer(TypeSerializer[bytes]):
+    typename = "bytes"
+
+    @staticmethod
+    def to_jsonable(value: bytes) -> TJSONLike:
+        return base64.b64encode(value).decode("ascii")
+
+    @staticmethod
+    def from_jsonable(value: TJSONLike) -> bytes:
+        assert isinstance(value, str)
+        return base64.b64decode(value, validate=True)
+
+
 COMMON_SERIALIZERS: list[Type[TypeSerializer]] = [
     DateSerializer,
     DatetimeSerializer,
@@ -159,6 +173,7 @@ def from_jsonable(value: TJSONLike) -> uuid.UUID:
     TimedeltaSerializer,
     DecimalSerializer,
     UUIDSerializer,
+    BytesSerializer,
 ]
 assert len(set(cls.typename for cls in COMMON_SERIALIZERS)) == len(COMMON_SERIALIZERS), "uniqueness check"