diff --git a/lbrynet/blob/blob_file.py b/lbrynet/blob/blob_file.py
index 9d6246d09..69790f261 100644
--- a/lbrynet/blob/blob_file.py
+++ b/lbrynet/blob/blob_file.py
@@ -1,4 +1,5 @@
 import os
+import re
 import asyncio
 import binascii
 import logging
@@ -21,6 +22,9 @@ def is_valid_hashcharacter(char: str) -> bool:
     return char in "0123456789abcdef"
 
 
+_hexmatch = re.compile("^[a-f,0-9]+$")
+
+
 def is_valid_blobhash(blobhash: str) -> bool:
     """Checks whether the blobhash is the correct length and contains only
     valid characters (0-9, a-f)
@@ -29,8 +33,7 @@ def is_valid_blobhash(blobhash: str) -> bool:
 
     @return: True/False
     """
-    return len(blobhash) == blobhash_length and all(is_valid_hashcharacter(l) for l in blobhash)
-
+    return len(blobhash) == blobhash_length and _hexmatch.match(blobhash)
 
 def encrypt_blob_bytes(key: bytes, iv: bytes, unencrypted: bytes) -> typing.Tuple[bytes, str]:
     cipher = Cipher(AES(key), modes.CBC(iv), backend=backend)