diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index e9da0e8..e4c4d33 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -1,6 +1,12 @@
 Changelog
 ---------
 
+0.8.3 (2014-08-XX)
+++++++++++++++++++
+
+- Fixed: `Issue #39 <https://github.com/maxtepkeev/python-redmine/issues/39>`__ (It was
+  impossible to save custom_fields in User resource via ``new()`` method)
+
 0.8.2 (2014-05-27)
 ++++++++++++++++++
 
diff --git a/docs/resources/user.rst b/docs/resources/user.rst
index 0bdcbc2..f757c8a 100644
--- a/docs/resources/user.rst
+++ b/docs/resources/user.rst
@@ -28,11 +28,12 @@ create
     :param string lastname: (required). User surname.
     :param string mail: (required). User email.
     :param integer auth_source_id: (optional). Authentication mode id.
+    :param list custom_fields: (optional). Custom fields in the form of [{'id': 1, 'value': 'foo'}].
     :return: User resource object
 
 .. code-block:: python
 
-    >>> user = redmine.user.create(login='jsmith', password='qwerty', firstname='John', lastname='Smith', mail='john@smith.com', auth_source_id=1)
+    >>> user = redmine.user.create(login='jsmith', password='qwerty', firstname='John', lastname='Smith', mail='john@smith.com', auth_source_id=1, custom_fields=[{'id': 1, 'value': 'foo'}, {'id': 2, 'value': 'bar'}])
     >>> user
     <redmine.resources.User #32 "John Smith">
 
@@ -58,6 +59,7 @@ new
     >>> user.lastname = 'Smith'
     >>> user.mail = 'john@smith.com'
     >>> user.auth_source_id = 1
+    >>> user.custom_fields = [{'id': 1, 'value': 'foo'}, {'id': 2, 'value': 'bar'}]
     >>> user.save()
     True
 
@@ -190,11 +192,12 @@ update
     :param string lastname: (optional). User surname.
     :param string mail: (optional). User email.
     :param integer auth_source_id: (optional). Authentication mode id.
+    :param list custom_fields: (optional). Custom fields in the form of [{'id': 1, 'value': 'foo'}].
     :return: True
 
 .. code-block:: python
 
-    >>> redmine.user.update(1, login='jsmith', password='qwerty', firstname='John', lastname='Smith', mail='john@smith.com', auth_source_id=1)
+    >>> redmine.user.update(1, login='jsmith', password='qwerty', firstname='John', lastname='Smith', mail='john@smith.com', auth_source_id=1, custom_fields=[{'id': 1, 'value': 'foo'}, {'id': 2, 'value': 'bar'}])
     True
 
 save
@@ -218,6 +221,7 @@ save
     >>> user.lastname = 'Smith'
     >>> user.mail = 'john@smith.com'
     >>> user.auth_source_id = 1
+    >>> user.custom_fields = [{'id': 1, 'value': 'foo'}, {'id': 2, 'value': 'bar'}]
     >>> user.save()
     True
 
diff --git a/redmine/resources.py b/redmine/resources.py
index b0825db..e246da3 100644
--- a/redmine/resources.py
+++ b/redmine/resources.py
@@ -618,7 +618,7 @@ class User(_Resource):
 
     _includes = ('memberships', 'groups')
     _unconvertible = ('status',)
-    _readonly = _Resource._readonly + ('api_key', 'last_login_on', 'custom_fields')
+    _readonly = _Resource._readonly + ('api_key', 'last_login_on')
 
     def __str__(self):
         try: