diff --git a/IPython/parallel/apps/ipcontrollerapp.py b/IPython/parallel/apps/ipcontrollerapp.py
index c0600c2..4ef765d 100755
--- a/IPython/parallel/apps/ipcontrollerapp.py
+++ b/IPython/parallel/apps/ipcontrollerapp.py
@@ -23,6 +23,7 @@ Authors:
 
 from __future__ import with_statement
 
+import json
 import os
 import socket
 import stat
@@ -34,11 +35,6 @@ import zmq
 from zmq.devices import ProcessMonitoredQueue
 from zmq.log.handlers import PUBHandler
 
-# Note: use our own import to work around jsonlib api mismatch.  When these
-# changes propagate to zmq, revert back to the following line instead:
-#from zmq.utils import jsonapi as json
-from IPython.zmq import jsonapi as json
-
 from IPython.core.profiledir import ProfileDir
 
 from IPython.parallel.apps.baseapp import (
@@ -214,7 +210,7 @@ class IPControllerApp(BaseParallelApplication):
                     location = '127.0.0.1'
             cdict['location'] = location
         fname = os.path.join(self.profile_dir.security_dir, fname)
-        with open(fname, 'wb') as f:
+        with open(fname, 'w') as f:
             f.write(json.dumps(cdict, indent=2))
         os.chmod(fname, stat.S_IRUSR|stat.S_IWUSR)
     
diff --git a/IPython/parallel/controller/scheduler.py b/IPython/parallel/controller/scheduler.py
index 3d723e8..90e913e 100644
--- a/IPython/parallel/controller/scheduler.py
+++ b/IPython/parallel/controller/scheduler.py
@@ -359,7 +359,9 @@ class TaskScheduler(SessionFactory):
         # turn timeouts into datetime objects:
         timeout = header.get('timeout', None)
         if timeout:
-            timeout = datetime.now() + timedelta(0,timeout,0)
+            # cast to float, because jsonlib returns floats as decimal.Decimal,
+            # which timedelta does not accept
+            timeout = datetime.now() + timedelta(0,float(timeout),0)
 
         args = [raw_msg, targets, after, follow, timeout]
 
diff --git a/IPython/zmq/entry_point.py b/IPython/zmq/entry_point.py
index 75d7803..bff59b3 100644
--- a/IPython/zmq/entry_point.py
+++ b/IPython/zmq/entry_point.py
@@ -4,6 +4,7 @@ launchers.
 
 # Standard library imports.
 import atexit
+import json
 import os
 import socket
 from subprocess import Popen, PIPE
@@ -12,11 +13,6 @@ import tempfile
 
 # System library imports
 
-# Note: use our own import to work around jsonlib api mismatch.  When these
-# changes propagate to zmq, revert back to the following line instead:
-#from zmq.utils import jsonapi as json
-from IPython.zmq import jsonapi as json
-
 # IPython imports
 from IPython.utils.localinterfaces import LOCALHOST
 from IPython.utils.py3compat import bytes_to_str
@@ -86,7 +82,7 @@ def write_connection_file(fname=None, shell_port=0, iopub_port=0, stdin_port=0, 
     cfg['ip'] = ip
     cfg['key'] = bytes_to_str(key)
     
-    with open(fname, 'wb') as f:
+    with open(fname, 'w') as f:
         f.write(json.dumps(cfg, indent=2))
     
     return fname, cfg
diff --git a/IPython/zmq/jsonapi.py b/IPython/zmq/jsonapi.py
deleted file mode 100644
index cb2271c..0000000
--- a/IPython/zmq/jsonapi.py
+++ /dev/null
@@ -1,36 +0,0 @@
-"""Wrap zmq's jsonapi and work around api incompatibilities.
-
-This file is effectively a replacement for zmq.utils.jsonapi, that works around
-incompatibilities between jsonlib and the stdlib json, such as the
-interpretation of the 'indent' keyword in dumps().
-"""
-#-----------------------------------------------------------------------------
-#  Copyright (C) 2011  The IPython Development Team
-#
-#  Distributed under the terms of the BSD License.  The full license is in
-#  the file COPYING, distributed as part of this software.
-#-----------------------------------------------------------------------------
-
-#-----------------------------------------------------------------------------
-# Imports
-#-----------------------------------------------------------------------------
-
-from zmq.utils import jsonapi as _json
-from zmq.utils.jsonapi import *
-
-#-----------------------------------------------------------------------------
-# Function definitions
-#-----------------------------------------------------------------------------
-try:
-    _json.dumps(1, indent=2)
-except TypeError:
-    # This happens with jsonlib, which takes indent as a string instead of as
-    # an int.
-    def dumps(o, **kw):
-        if 'indent' in kw:
-            indent = kw.pop('indent')
-            if isinstance(indent, int):
-                indent = ' ' * indent
-            kw['indent'] = indent
-            
-        return _json.dumps(o, **kw)