diff --git a/beem/cli.py b/beem/cli.py
index cf81d07578df2bfb9590dbf32734ed5bb9a79357..3bf57a8a9ffa7aadf60c40971978e0e36576b427 100644
--- a/beem/cli.py
+++ b/beem/cli.py
@@ -9,7 +9,7 @@ import calendar
 import pytz
 import time
 import hashlib
-import math
+#import math currently unused module
 import random
 import logging
 import click
diff --git a/beem/transactionbuilder.py b/beem/transactionbuilder.py
index ca76a1b31b8a9dbb7ae724d389eb81f6ef2d5c39..b6ceb846c723fb1b506e472f1252f24ea616164b 100644
--- a/beem/transactionbuilder.py
+++ b/beem/transactionbuilder.py
@@ -1,7 +1,7 @@
 # -*- coding: utf-8 -*-
 import logging
 import struct
-import time
+#import time (not currently used)
 from datetime import timedelta
 from binascii import unhexlify
 from beemgraphenebase.py23 import bytes_types, integer_types, string_types, text_type
@@ -11,7 +11,7 @@ from beembase.objects import Operation
 from beemgraphenebase.account import PrivateKey, PublicKey
 from beembase.signedtransactions import Signed_Transaction
 from beembase.ledgertransactions import Ledger_Transaction
-from beembase import transactions, operations
+from beembase import operations #removed deprecated transactions module
 from .exceptions import (
     InsufficientAuthorityError,
     MissingKeyError,
diff --git a/beembase/operationids.py b/beembase/operationids.py
index 6b3d023c21c385aafb1d41030f6a495548c425d2..36ae82da761d256438e65781a75c851e3452e7b5 100644
--- a/beembase/operationids.py
+++ b/beembase/operationids.py
@@ -10,6 +10,7 @@ ops = [
     'limit_order_cancel',
     'feed_publish',
     'convert',
+    'collateralized_convert'
     'account_create',
     'account_update',
     'witness_update',
@@ -64,7 +65,6 @@ ops = [
     'comment_payout_update',
     'return_vesting_delegation',
     'comment_benefactor_reward',
-    'producer_reward',
     'clear_null_account_balance',
     'proposal_pay',
     'sps_fund',
diff --git a/beembase/operations.py b/beembase/operations.py
index 126024a93a997c8a6507d02ad81e2284d1dec18c..aca68bce5c18b6c1b189df6a5d8909893aed72c4 100644
--- a/beembase/operations.py
+++ b/beembase/operations.py
@@ -642,6 +642,24 @@ class Convert(GrapheneObject):
                 ('amount', Amount(kwargs["amount"], prefix=prefix, json_str=json_str)),
             ]))
 
+#Operation added for HF25 for the new HBD/Hive conversion operation
+class Collateralized_convert(GrapheneObject):
+    def __init__(self, *args, **kwargs):
+        if check_for_class(self, args):
+            return
+        if len(args) == 1 and len(kwargs) == 0:
+            kwargs = args[0]
+        prefix = kwargs.get("prefix", default_prefix)
+        json_str = kwargs.get("json_str", False)
+        super(Collateralized_convert, self).__init__(
+            OrderedDict([
+                ('owner', String(kwargs["owner"])),
+                ('requestid', Uint32(kwargs["requestid"])),
+                ('amount', Amount(kwargs["amount"], prefix=prefix, json_str=json_str)),
+            
+            ]))
+
+
 
 class Set_withdraw_vesting_route(GrapheneObject):
     def __init__(self, *args, **kwargs):