diff --git a/cashu/core/base.py b/cashu/core/base.py
index dd9a248..d54913a 100644
--- a/cashu/core/base.py
+++ b/cashu/core/base.py
@@ -268,8 +268,10 @@ class MintKeyset:
     def from_row(cls, row: Row):
         if row is None:
             return cls
+        # fix to convert byte to string, unclear why this is necessary
+        id = row[0].decode("ascii") if type(row[0]) == bytes else row[0]
         return cls(
-            id=row[0].decode("ascii"),
+            id=id,
             derivation_path=row[1],
             valid_from=row[2],
             valid_to=row[3],
diff --git a/cashu/core/crypto.py b/cashu/core/crypto.py
index 15a8023..379d3ed 100644
--- a/cashu/core/crypto.py
+++ b/cashu/core/crypto.py
@@ -1,6 +1,7 @@
+import base64
 import hashlib
 from typing import Dict, List
-import base64
+
 from cashu.core.secp import PrivateKey, PublicKey
 from cashu.core.settings import MAX_ORDER
 
diff --git a/cashu/mint/router.py b/cashu/mint/router.py
index e7842d7..ae78859 100644
--- a/cashu/mint/router.py
+++ b/cashu/mint/router.py
@@ -15,7 +15,6 @@ from cashu.core.base import (
     SplitRequest,
 )
 from cashu.core.errors import CashuError
-
 from cashu.mint import ledger
 
 router: APIRouter = APIRouter()