diff --git a/respodns/db.py b/respodns/db.py
index 7fcac9b..ed40a3e 100644
--- a/respodns/db.py
+++ b/respodns/db.py
@@ -196,8 +196,8 @@ class RespoDB:
 
     def all_ips(self):
         assert self._conn is not None
-        addresses = self._conn.query(TAddress).fetchall()
-        return [addr.str for addr in addresses]
+        temp = self._conn.query(TAddress).values(TAddress.str)
+        return [t[0] for t in temp]
 
     def next_record_id(self):
         from sqlalchemy.sql.expression import func