diff --git a/src/core/setup_arq.py b/src/core/setup_arq.py
index bd6ddee..0fe9584 100644
--- a/src/core/setup_arq.py
+++ b/src/core/setup_arq.py
@@ -1,3 +1,6 @@
+import asyncio
+from typing import Any
+
 import msgpack
 
 from app.services.cache_updater import (
@@ -24,6 +27,26 @@ async def shutdown(ctx):
         await database.disconnect()
 
 
+def default(obj: Any):
+    if isinstance(obj, asyncio.TimeoutError):
+        return msgpack.ExtType(0, "")
+    raise TypeError("Unknown type: %r" % (obj,))
+
+
+def ext_hook(code: int, data: str):
+    if code == 0:
+        return asyncio.TimeoutError()
+    return msgpack.ExtType(code, data)
+
+
+def job_serializer(d):
+    return msgpack.packb(d, default=default, use_bin_type=True)  # noqa: E731
+
+
+def job_deserializer(b):
+    return msgpack.unpackb(b, ext_hook=ext_hook, raw=False)  # noqa: E731
+
+
 class WorkerSettings:
     functions = [check_books, check_books_page, cache_file_by_book_id]
     on_startup = startup
@@ -32,6 +55,6 @@ class WorkerSettings:
     max_jobs = 2
     max_tries = 1
     job_timeout = 10 * 60
-    job_serializer = msgpack.packb
-    job_deserializer = lambda b: msgpack.unpackb(b, raw=False)  # noqa: E731
     expires_extra_ms = 7 * 24 * 60 * 1000
+    job_serializer = job_serializer
+    job_deserializer = job_deserializer