diff --git a/jmclient/jmclient/taker_utils.py b/jmclient/jmclient/taker_utils.py
index ea03973..c522b87 100644
--- a/jmclient/jmclient/taker_utils.py
+++ b/jmclient/jmclient/taker_utils.py
@@ -39,7 +39,7 @@ def direct_send(wallet, amount, mixdepth, destaddr, answeryes=False,
     """
     #Sanity checks
     assert validate_address(destaddr)[0]
-    assert isinstance(mixdepth, int)
+    assert isinstance(mixdepth, numbers.Integral)
     assert mixdepth >= 0
     assert isinstance(amount, numbers.Integral)
     assert amount >=0
diff --git a/jmclient/jmclient/wallet.py b/jmclient/jmclient/wallet.py
index d0330da..c00e1cc 100644
--- a/jmclient/jmclient/wallet.py
+++ b/jmclient/jmclient/wallet.py
@@ -12,6 +12,7 @@ from mnemonic import Mnemonic
 from hashlib import sha256
 from itertools import chain
 from decimal import Decimal
+from numbers import Integral
 
 
 from .configure import jm_single
@@ -489,9 +490,9 @@ class BaseWallet(object):
 
     def add_utxo(self, txid, index, script, value):
         assert isinstance(txid, bytes)
-        assert isinstance(index, int)
+        assert isinstance(index, Integral)
         assert isinstance(script, bytes)
-        assert isinstance(value, int)
+        assert isinstance(value, Integral)
 
         if script not in self._script_map:
             raise WalletError("Tried to add UTXO for unknown key to wallet.")
@@ -1136,7 +1137,7 @@ class BIP32Wallet(BaseWallet):
 
     def get_path(self, mixdepth=None, internal=None, index=None):
         if mixdepth is not None:
-            assert isinstance(mixdepth, int)
+            assert isinstance(mixdepth, Integral)
             if not 0 <= mixdepth <= self.max_mixdepth:
                 raise WalletError("Mixdepth outside of wallet's range.")
 
@@ -1146,7 +1147,7 @@ class BIP32Wallet(BaseWallet):
             int_type = self._get_internal_type(internal)
 
         if index is not None:
-            assert isinstance(index, int)
+            assert isinstance(index, Integral)
             if internal is None:
                 raise Exception("internal must be set if index is set")
             assert index <= self._index_cache[mixdepth][int_type]
@@ -1164,7 +1165,7 @@ class BIP32Wallet(BaseWallet):
 
     @classmethod
     def _harden_path_level(cls, lvl):
-        assert isinstance(lvl, int)
+        assert isinstance(lvl, Integral)
         if not 0 <= lvl < cls.BIP32_MAX_PATH_LEVEL:
             raise WalletError("Unable to derive hardened path level from {}."
                               "".format(lvl))
@@ -1172,7 +1173,7 @@ class BIP32Wallet(BaseWallet):
 
     @classmethod
     def _path_level_to_repr(cls, lvl):
-        assert isinstance(lvl, int)
+        assert isinstance(lvl, Integral)
         if not 0 <= lvl < cls.BIP32_MAX_PATH_LEVEL * 2:
             raise WalletError("Invalid path level {}.".format(lvl))
         if lvl < cls.BIP32_MAX_PATH_LEVEL:
diff --git a/jmclient/jmclient/wallet_utils.py b/jmclient/jmclient/wallet_utils.py
index 68ae484..fba6e40 100644
--- a/jmclient/jmclient/wallet_utils.py
+++ b/jmclient/jmclient/wallet_utils.py
@@ -6,6 +6,7 @@ import sqlite3
 import binascii
 from datetime import datetime
 from optparse import OptionParser
+from numbers import Integral
 from jmclient import (get_network, WALLET_IMPLEMENTATIONS, Storage, podle,
     jm_single, BitcoinCoreInterface, JsonRpcError, sync_wallet, WalletError,
     VolatileStorage, StoragePasswordError,
@@ -167,7 +168,7 @@ class WalletViewEntry(WalletViewBase):
         self.account = account
         assert forchange in [0, 1, -1]
         self.forchange =forchange
-        assert isinstance(aindex, int)
+        assert isinstance(aindex, Integral)
         assert aindex >= 0
         self.aindex = aindex
         self.address = addr
diff --git a/jmdaemon/jmdaemon/daemon_protocol.py b/jmdaemon/jmdaemon/daemon_protocol.py
index 1997d93..fc91d79 100644
--- a/jmdaemon/jmdaemon/daemon_protocol.py
+++ b/jmdaemon/jmdaemon/daemon_protocol.py
@@ -23,6 +23,7 @@ import threading
 import os
 import copy
 from functools import wraps
+from numbers import Integral
 
 """Joinmarket application protocol control flow.
 For documentation on protocol (formats, message sequence) see
@@ -228,9 +229,10 @@ class JMDaemonServerProtocol(amp.AMP, OrderbookWatch):
     @JMFill.responder
     def on_JM_FILL(self, amount, commitment, revelation, filled_offers):
         """Takes the necessary data from the Taker and initiates the Stage 1
-	interaction with the Makers.
-	"""
-        if not (self.jm_state == 1 and isinstance(amount, int) and amount >=0):
+        interaction with the Makers.
+        """
+        if not (self.jm_state == 1 and isinstance(amount, Integral)
+                and amount >= 0):
             return {'accepted': False}
         self.cjamount = amount
         self.commitment = commitment
diff --git a/jmdaemon/jmdaemon/orderbookwatch.py b/jmdaemon/jmdaemon/orderbookwatch.py
index fae9380..3e48e55 100644
--- a/jmdaemon/jmdaemon/orderbookwatch.py
+++ b/jmdaemon/jmdaemon/orderbookwatch.py
@@ -10,6 +10,7 @@ import time
 import threading
 import json
 from decimal import InvalidOperation, Decimal
+from numbers import Integral
 
 from jmdaemon.protocol import JM_VERSION
 from jmbase.support import get_log, joinmarket_alert, DUST_THRESHOLD
@@ -95,7 +96,8 @@ class OrderbookWatch(object):
                        "from {}").format
                 log.debug(fmt(minsize, maxsize, counterparty))
                 return
-            if ordertype in ['swabsoffer', 'absoffer'] and not isinstance(cjfee, int):
+            if ordertype in ['swabsoffer', 'absoffer']\
+                    and not isinstance(cjfee, Integral):
                 try:
                     cjfee = int(cjfee)
                 except ValueError: