diff --git a/tosfs/core.py b/tosfs/core.py
index 0634f5e..ea142df 100644
--- a/tosfs/core.py
+++ b/tosfs/core.py
@@ -388,9 +388,7 @@ def rmdir(self, path: str) -> None:
 
         try:
             self.tos_client.delete_object(bucket, key.rstrip("/") + "/")
-        except tos.exceptions.TosClientError as e:
-            raise e
-        except tos.exceptions.TosServerError as e:
+        except (TosClientError, TosServerError) as e:
             raise e
         except Exception as e:
             raise TosfsError(f"Tosfs failed with unknown error: {e}") from e
@@ -473,11 +471,7 @@ def mkdir(self, path: str, create_parents: bool = True, **kwargs: Any) -> None:
                     )
                 else:
                     self.tos_client.put_object(bucket, key.rstrip("/") + "/")
-        except tos.exceptions.TosClientError as e:
-            raise e
-        except tos.exceptions.TosServerError as e:
-            raise e
-        except FileNotFoundError as e:
+        except (TosClientError, TosServerError, FileNotFoundError) as e:
             raise e
         except Exception as e:
             raise TosfsError(f"Tosfs failed with unknown error: {e}") from e
@@ -542,9 +536,7 @@ def touch(self, path: str, truncate: bool = True, **kwargs: Any) -> None:
 
         try:
             self.tos_client.put_object(bucket, key)
-        except tos.exceptions.TosClientError as e:
-            raise e
-        except tos.exceptions.TosServerError as e:
+        except (TosClientError, TosServerError) as e:
             raise e
         except Exception as e:
             raise TosfsError(f"Tosfs failed with unknown error: {e}") from e
@@ -587,9 +579,9 @@ def isdir(self, path: str) -> bool:
         try:
             self.tos_client.head_object(bucket, key)
             return True
-        except tos.exceptions.TosClientError as e:
+        except TosClientError as e:
             raise e
-        except tos.exceptions.TosServerError as e:
+        except TosServerError as e:
             if e.status_code == TOS_SERVER_RESPONSE_CODE_NOT_FOUND:
                 return False
             else:
@@ -622,9 +614,9 @@ def isfile(self, path: str) -> bool:
             # Attempt to get the object metadata
             self.tos_client.head_object(bucket, key)
             return True
-        except tos.exceptions.TosClientError as e:
+        except TosClientError as e:
             raise e
-        except tos.exceptions.TosServerError as e:
+        except TosServerError as e:
             if e.status_code == TOS_SERVER_RESPONSE_CODE_NOT_FOUND:
                 return False
             raise e
@@ -712,9 +704,7 @@ def put_file(
                     self.tos_client.complete_multipart_upload(
                         bucket, key, mpu.upload_id, complete_all=True
                     )
-        except tos.exceptions.TosClientError as e:
-            raise e
-        except tos.exceptions.TosServerError as e:
+        except (TosClientError, TosServerError) as e:
             raise e
         except Exception as e:
             raise TosfsError(f"Tosfs failed with unknown error: {e}") from e
@@ -759,7 +749,7 @@ def _read_chunks(body: BinaryIO, f: BinaryIO) -> None:
             while True:
                 try:
                     chunk = body.read(GET_OBJECT_OPERATION_DEFAULT_READ_CHUNK_SIZE)
-                except tos.exceptions.TosClientError as e:
+                except TosClientError as e:
                     failed_reads += 1
                     if failed_reads >= RETRY_NUM:
                         raise e
@@ -1159,9 +1149,7 @@ def _copy_basic(self, path1: str, path2: str, **kwargs: Any) -> None:
                 src_key=key1,
                 src_version_id=ver1,
             )
-        except tos.exceptions.TosClientError as e:
-            raise e
-        except tos.exceptions.TosServerError as e:
+        except (TosClientError, TosServerError) as e:
             raise e
         except Exception as e:
             raise TosfsError("Copy failed (%r -> %r): %s" % (path1, path2, e)) from e
@@ -1320,9 +1308,7 @@ def _open_remote_file(
                 **kwargs,
             )
             return resp.content, resp.content_length
-        except tos.exceptions.TosClientError as e:
-            raise e
-        except tos.exceptions.TosServerError as e:
+        except (TosClientError, TosServerError) as e:
             raise e
         except Exception as e:
             raise TosfsError(f"Tosfs failed with unknown error: {e}") from e
@@ -1361,9 +1347,9 @@ def _bucket_info(self, bucket: str) -> dict:
         try:
             self.tos_client.head_bucket(bucket)
             return self._fill_bucket_info(bucket)
-        except tos.exceptions.TosClientError as e:
+        except TosClientError as e:
             raise e
-        except tos.exceptions.TosServerError as e:
+        except TosServerError as e:
             if e.status_code == TOS_SERVER_RESPONSE_CODE_NOT_FOUND:
                 raise FileNotFoundError(bucket) from e
             else:
@@ -1420,9 +1406,9 @@ def _object_info(
                 "VersionId": out.version_id or "",
                 "ContentType": out.content_type or "",
             }
-        except tos.exceptions.TosClientError as e:
+        except TosClientError as e:
             raise e
-        except tos.exceptions.TosServerError as e:
+        except TosServerError as e:
             if e.status_code == TOS_SERVER_RESPONSE_CODE_NOT_FOUND:
                 pass
             else:
@@ -1452,11 +1438,7 @@ def _try_dir_info(self, bucket: str, key: str, path: str, fullpath: str) -> dict
                 }
 
             raise FileNotFoundError(path)
-        except tos.exceptions.TosClientError as e:
-            raise e
-        except tos.exceptions.TosServerError as e:
-            raise e
-        except FileNotFoundError as e:
+        except (TosClientError, TosServerError, FileNotFoundError) as e:
             raise e
         except Exception as e:
             raise TosfsError(f"Tosfs failed with unknown error: {e}") from e
@@ -1542,9 +1524,9 @@ def _exists_bucket(self, bucket: str) -> bool:
         try:
             self.tos_client.head_bucket(bucket)
             return True
-        except tos.exceptions.TosClientError as e:
+        except TosClientError as e:
             raise e
-        except tos.exceptions.TosServerError as e:
+        except TosServerError as e:
             if e.status_code == TOS_SERVER_RESPONSE_CODE_NOT_FOUND:
                 return False
             else:
@@ -1594,9 +1576,9 @@ def _exists_object(
         try:
             self.tos_client.head_object(bucket, key)
             return True
-        except tos.exceptions.TosClientError as e:
+        except TosClientError as e:
             raise e
-        except tos.exceptions.TosServerError as e:
+        except TosServerError as e:
             if e.status_code == TOS_SERVER_RESPONSE_CODE_NOT_FOUND:
                 return False
             else:
@@ -1631,9 +1613,7 @@ def _lsbuckets(self) -> List[dict]:
         """
         try:
             resp = self.tos_client.list_buckets()
-        except tos.exceptions.TosClientError as e:
-            raise e
-        except tos.exceptions.TosServerError as e:
+        except (TosClientError, TosServerError) as e:
             raise e
         except Exception as e:
             raise TosfsError(f"Tosfs failed with unknown error: {e}") from e
@@ -1801,9 +1781,7 @@ def _listdir(
                     all_results.extend(resp.contents + resp.common_prefixes)
 
             return all_results
-        except tos.exceptions.TosClientError as e:
-            raise e
-        except tos.exceptions.TosServerError as e:
+        except (TosClientError, TosServerError) as e:
             raise e
         except Exception as e:
             raise TosfsError(f"Tosfs failed with unknown error: {e}") from e
@@ -1817,9 +1795,7 @@ def _rm(self, path: str) -> None:
 
         try:
             self.tos_client.delete_object(bucket, key)
-        except tos.exceptions.TosClientError as e:
-            raise e
-        except tos.exceptions.TosServerError as e:
+        except (TosClientError, TosServerError) as e:
             raise e
         except Exception as e:
             raise TosfsError(f"Tosfs failed with unknown error: {e}") from e
diff --git a/tosfs/utils.py b/tosfs/utils.py
index 0e96e96..36f1944 100644
--- a/tosfs/utils.py
+++ b/tosfs/utils.py
@@ -20,7 +20,7 @@
 import time
 from typing import Any, Generator, Optional, Tuple
 
-import tos
+from tos.exceptions import TosServerError
 
 from tosfs.consts import TOS_SERVER_RETRYABLE_ERROR_CODE_SET
 
@@ -117,7 +117,7 @@ def retryable_func_wrapper(
     for i in range(retries):
         try:
             return func(*args, **kwargs)
-        except tos.exceptions.TosServerError as e:
+        except TosServerError as e:
             err = e
             from tosfs.core import logger