diff --git a/cashu/core/base.py b/cashu/core/base.py
index c2e88e4..11eb042 100644
--- a/cashu/core/base.py
+++ b/cashu/core/base.py
@@ -261,7 +261,9 @@ class WalletKeyset:
 
         return cls(
             id=row["id"],
-            public_keys=deserialize(str(row["public_keys"])),
+            public_keys=deserialize(str(row["public_keys"]))
+            if dict(row).get("public_keys")
+            else {},
             mint_url=row["mint_url"],
             valid_from=row["valid_from"],
             valid_to=row["valid_to"],
diff --git a/requirements.txt b/requirements.txt
index 5e8c44a..5204a4e 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -13,6 +13,8 @@ environs==9.5.0 ; python_version >= "3.7" and python_version < "4.0"
 exceptiongroup==1.1.0 ; python_version >= "3.7" and python_version < "3.11"
 fastapi==0.83.0 ; python_version >= "3.7" and python_version < "4.0"
 h11==0.12.0 ; python_version >= "3.7" and python_version < "4.0"
+httpcore==0.15.0 ; python_version >= "3.7" and python_version < "4.0"
+httpx==0.23.0 ; python_version >= "3.7" and python_version < "4.0"
 idna==3.4 ; python_version >= "3.7" and python_version < "4"
 importlib-metadata==5.2.0 ; python_version >= "3.7" and python_version < "4.0"
 iniconfig==2.0.0 ; python_version >= "3.7" and python_version < "4.0"
@@ -31,6 +33,7 @@ python-bitcoinlib==0.11.2 ; python_version >= "3.7" and python_version < "4.0"
 python-dotenv==0.21.1 ; python_version >= "3.7" and python_version < "4.0"
 represent==1.6.0.post0 ; python_version >= "3.7" and python_version < "4.0"
 requests==2.28.2 ; python_version >= "3.7" and python_version < "4"
+rfc3986[idna2008]==1.5.0 ; python_version >= "3.7" and python_version < "4.0"
 secp256k1==0.14.0 ; python_version >= "3.7" and python_version < "4.0"
 setuptools==65.7.0 ; python_version >= "3.7" and python_version < "4.0"
 six==1.16.0 ; python_version >= "3.7" and python_version < "4.0"