diff --git a/.travis.yml b/.travis.yml
index 7c7868b..791db49 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,25 +1,49 @@
 language: python
 services: mongodb
 python:
+  - "3.5"
+  - "3.4"
   - "3.3"
   - "3.2"
   - "2.7"
   - "2.6"
-  - "2.5"
   - "pypy"
 env:
-  - DJANGO="Django>=1.4,<1.5"
-  - DJANGO="Django>=1.5"
+  - DJANGO="Django>=1.6,<1.7"
+  - DJANGO="Django>=1.7,<1.8"
+  - DJANGO="Django>=1.8,<1.9"
+  - DJANGO="Django>=1.9,<1.10"
+  - DJANGO="Django>=1.10,<1.11"
 matrix:
   exclude:
-    - python: "3.3"
-      env: DJANGO="Django>=1.4,<1.5"
-    - python: "3.2"
-      env: DJANGO="Django>=1.4,<1.5"
     - python: "2.6"
-      env: DJANGO="Django>=1.5"
-    - python: "2.5"
-      env: DJANGO="Django>=1.5"
+      env: DJANGO="Django>=1.7,<1.8"
+    - python: "2.6"
+      env: DJANGO="Django>=1.8,<1.9"
+    - python: "2.6"
+      env: DJANGO="Django>=1.9,<1.10"
+    - python: "2.6"
+      env: DJANGO="Django>=1.10,<1.11"
+
+    - python: "3.2"
+      env: DJANGO="Django>=1.9,<1.10"
+    - python: "3.2"
+      env: DJANGO="Django>=1.10,<1.11"
+
+    - python: "3.3"
+      env: DJANGO="Django>=1.7,<1.8"
+    - python: "3.3"
+      env: DJANGO="Django>=1.9,<1.10"
+    - python: "3.3"
+      env: DJANGO="Django>=1.10,<1.11"
+
+    - python: "3.4"
+      env: DJANGO="Django>=1.6,<1.7"
+
+    - python: "3.5"
+      env: DJANGO="Django>=1.6,<1.7"
+    - python: "3.5"
+      env: DJANGO="Django>=1.7,<1.8"
 install:
   - pip install $DJANGO --use-mirrors
 script: python setup.py nosetests
diff --git a/AUTHORS b/AUTHORS
new file mode 100644
index 0000000..f250bef
--- /dev/null
+++ b/AUTHORS
@@ -0,0 +1,6 @@
+django-mongo-session is written and maintained by ``hellysmile`` and following contributors:
+
+Patches and Suggestions
+```````````````````````
+
+- Andrew Lytvyn (``litwisha``)
diff --git a/README.rst b/README.rst
index b866c5f..a21ecaf 100644
--- a/README.rst
+++ b/README.rst
@@ -24,10 +24,10 @@ set ``mongo_sessions.session`` as session engine::
 settings
 --------
 
-there is two ways to setup mongodb connection at ``settings.py``
+there are two ways to setup mongodb connection at ``settings.py``
 
 
-first, if already have mongo connection, like::
+first, if already have mongo connection as ``pymongo.database.Database`` instance::
 
     import pymongo
     from pymongo import MongoClient
@@ -35,6 +35,26 @@ first, if already have mongo connection, like::
     MONGO_CLIENT = connection.your_database
     MONGO_SESSIONS_COLLECTION = 'mongo_sessions' # default option
 
+or as ``pymongo.MongoClient`` instance::
+
+    import pymongo
+    from pymongo import MongoClient
+    connection = MongoClient()
+    MONGO_CLIENT = connection
+    MONGO_DB_NAME = 'test'  # default option
+    MONGO_SESSIONS_COLLECTION = 'mongo_sessions' # default option
+
+
+
+Also, ``MONGO_CLIENT`` setting can be a dotted path string to ``pymongo.MongoClient`` or ``pymongo.database.Database`` instances::
+
+    MONGO_CLIENT = 'project.main.client'  # MongoClient instance
+    MONGO_DB_NAME = 'test'  # default option
+
+or::
+
+    MONGO_CLIENT = 'project.main.db'  # pymongo.database.Database instance
+
 second, if you need to connect to mongodb, like::
 
     MONGO_PORT = 27017
diff --git a/mongo_sessions/settings.py b/mongo_sessions/settings.py
index 2235790..f3e44ae 100644
--- a/mongo_sessions/settings.py
+++ b/mongo_sessions/settings.py
@@ -1,9 +1,19 @@
 from django.conf import settings
 from django.core.exceptions import ImproperlyConfigured
+from django.utils import six
+from pymongo import MongoClient
+from pymongo.database import Database
 
+try:
+    from django.utils.module_loading import import_string
+except ImportError:
+    # Django  1.5 <= version <= 1.6
+    from django.utils.module_loading import import_by_path as import_string
 
 MONGO_CLIENT = getattr(settings, 'MONGO_CLIENT', False)
 
+MONGO_DB_NAME = getattr(settings, 'MONGO_DB_NAME', 'test')
+
 MONGO_SESSIONS_COLLECTION = getattr(
     settings, 'MONGO_SESSIONS_COLLECTION', 'mongo_sessions'
 )
@@ -14,30 +24,44 @@
     settings, 'MONGO_SESSIONS_TTL', settings.SESSION_COOKIE_AGE
 )
 
-if not MONGO_CLIENT:
+if MONGO_CLIENT:
+    if isinstance(MONGO_CLIENT, six.string_types):
+        MONGO_CLIENT = import_string(MONGO_CLIENT)
+
+    if isinstance(MONGO_CLIENT, MongoClient):
+        MONGO_DB = MONGO_CLIENT[MONGO_DB_NAME]
+
+    elif isinstance(MONGO_CLIENT, Database):
+        MONGO_DB = MONGO_CLIENT
+
+    else:
+        raise ImproperlyConfigured(
+            '''
+            Incorrect MONGO_CLIENT settings.
+            Must be MongoClient or Database instance
+            '''
+        )
+else:
     MONGO_PORT = int(getattr(settings, 'MONGO_PORT', 27017))
     MONGO_HOST = getattr(settings, 'MONGO_HOST', 'localhost')
-    MONGO_DB_NAME = getattr(settings, 'MONGO_DB_NAME', 'test')
     MONGO_DB_USER = getattr(settings, 'MONGO_DB_USER', False)
     MONGO_DB_PASSWORD = getattr(settings, 'MONGO_DB_PASSWORD', False)
 
-    from pymongo import MongoClient
-
     MONGO_CLIENT = MongoClient(
         host=MONGO_HOST,
         port=MONGO_PORT,
     )
 
-    MONGO_CLIENT = MONGO_CLIENT[MONGO_DB_NAME]
+    MONGO_DB = MONGO_CLIENT[MONGO_DB_NAME]
 
     if MONGO_DB_USER and MONGO_DB_PASSWORD:
-        MONGO_CLIENT.authenticate(MONGO_DB_USER, MONGO_DB_PASSWORD)
+        MONGO_DB.authenticate(MONGO_DB_USER, MONGO_DB_PASSWORD)
 
 try:
-    MONGO_DB_VERSION = MONGO_CLIENT.connection.server_info()['version']
+    MONGO_DB_VERSION = MONGO_DB.connection.server_info()['version']
 except TypeError:
     # for pymongo >= 3
-    MONGO_DB_VERSION = MONGO_CLIENT.client.server_info()['version']
+    MONGO_DB_VERSION = MONGO_DB.client.server_info()['version']
 
 if not float('.'.join(MONGO_DB_VERSION.split('.')[:-1])) >= 2.2:
     raise ImproperlyConfigured(
@@ -47,7 +71,7 @@
         '''
     )
 
-DB_COLLECTION = MONGO_CLIENT[MONGO_SESSIONS_COLLECTION]
+DB_COLLECTION = MONGO_DB[MONGO_SESSIONS_COLLECTION]
 
 MONGO_SESSIONS_INDEXES = DB_COLLECTION.index_information()
 
@@ -55,7 +79,7 @@
 if len(MONGO_SESSIONS_INDEXES) <= 1:
     DB_COLLECTION.ensure_index(
         'session_key',
-        unique=True
+        unique=True,
     )
 
     DB_COLLECTION.ensure_index(
@@ -72,7 +96,7 @@
 
     DB_COLLECTION.ensure_index(
         'creation_date',
-        expireAfterSeconds=MONGO_SESSIONS_TTL
+        expireAfterSeconds=MONGO_SESSIONS_TTL,
     )
 
     MONGO_SESSIONS_INDEXES = DB_COLLECTION.index_information()
diff --git a/setup.py b/setup.py
index 373a446..1d45deb 100644
--- a/setup.py
+++ b/setup.py
@@ -49,8 +49,8 @@ def long_description():
     url='https://github.com/hellysmile/django-mongo-sessions',
     zip_safe=False,
     install_requires=[
-        'django >= 1.4',
-        'pymongo >= 2.4.2'
+        'django >= 1.6',
+        'pymongo >= 2.4.2',
     ],
     license='http://www.apache.org/licenses/LICENSE-2.0',
     classifiers=filter(None, classifiers.split('\n')),
diff --git a/tests/__init__.py b/tests/__init__.py
index eea09e6..7f8c64d 100644
--- a/tests/__init__.py
+++ b/tests/__init__.py
@@ -3,5 +3,5 @@
 
 settings.configure(
     SESSION_ENGINE='mongo_sessions.session',
-    SESSION_COOKIE_AGE=10
+    SESSION_COOKIE_AGE=10,
 )
diff --git a/tests/tests.py b/tests/tests.py
index 50a7325..0deb336 100644
--- a/tests/tests.py
+++ b/tests/tests.py
@@ -1,4 +1,14 @@
 # tests stolen from https://github.com/martinrusev/django-redis-sessions
+import time
+from imp import reload
+
+from django.conf import settings
+from django.core.exceptions import ImproperlyConfigured
+from django.test.utils import override_settings
+
+from mongo_sessions import settings as mongo_session_settings
+from nose.tools import assert_raises, eq_
+
 try:
     # For Django versions < 1.9
     from django.utils.importlib import import_module
@@ -6,12 +16,35 @@
     # For Django versions >= 1.9
     from django.utils.module_loading import import_module
 
-from django.conf import settings
-import time
-from nose.tools import eq_
+session_engine = import_module(settings.SESSION_ENGINE).SessionStore()
 
+incorrect_db = object()
 
-session_engine = import_module(settings.SESSION_ENGINE).SessionStore()
+
+def test_incorrect_mongo_client_setting():
+    def _test_connection(settings, exc):
+        with override_settings(**settings):
+            # because older versions has no support as contextmanager
+            assert_raises(exc, reload, mongo_session_settings)
+
+    # test non-existent mongoDB instance
+    settings = {
+        'MONGO_CLIENT': 'wrong.conn.string',
+    }
+    # different exceptions in different django versions
+    _test_connection(settings, (ImportError, ImproperlyConfigured))
+
+    # test invalid mongoDB instance
+    settings = {
+        'MONGO_CLIENT': object(),
+    }
+    _test_connection(settings, ImproperlyConfigured)
+
+    # test invalid mongoDB instance as str
+    settings = {
+        'MONGO_CLIENT': 'tests.tests.incorrect_db',
+    }
+    _test_connection(settings, ImproperlyConfigured)
 
 
 def test_modify_and_keys():
diff --git a/tox.ini b/tox.ini
index 7caf3ac..1d7ee1d 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,13 +1,21 @@
 [tox]
 envlist =
-    py25-dj14,
-    py26-dj14,
-    py27-dj14,
-    py27-dj15,
-    py32-dj15,
-    py33-dj15,
-    pypy19-dj14,
-    pypy19-dj15
+    py26-dj16,
+    py27-dj16,
+    py32-dj16,
+    py33-dj16,
+    py27-dj17,
+    py32-dj17,
+    py33-dj17,
+    py34-dj17,
+    py27-dj18,
+    py32-dj18,
+    py33-dj18,
+    py34-dj18,
+    py35-dj18,
+    py27-dj19,
+    py34-dj19,
+    py35-dj19,
 
 [base]
 deps =
@@ -17,50 +25,121 @@ deps =
 commands =
     {envpython} setup.py nosetests
 
-[testenv:py25-dj14]
-basepython=python2.5
+# django 1.6 on python versions: 2.6, 2.7, 3.2, 3.3
+[testenv:py26-dj16]
+basepython=python2.6
 deps =
-    Django>=1.4,<1.5
+    Django>=1.6,<1.7
     {[base]deps}
 
-[testenv:py26-dj14]
-basepython=python2.6
+[testenv:py27-dj16]
+basepython=python2.7
+deps =
+    Django>=1.6,<1.7
+    {[base]deps}
+
+[testenv:py32-dj16]
+basepython=python3.2
+deps =
+    Django>=1.6,<1.7
+    {[base]deps}
+
+[testenv:py33-dj16]
+basepython=python3.3
 deps =
-    Django>=1.4,<1.5
+    Django>=1.6,<1.7
     {[base]deps}
 
-[testenv:py27-dj14]
+# django 1.7 on python versions: 2.7, 3.2, 3.4
+[testenv:py27-dj17]
 basepython=python2.7
 deps =
-    Django>=1.4,<1.5
+    Django>=1.7,<1.8
+    {[base]deps}
+
+[testenv:py32-dj17]
+basepython=python3.2
+deps =
+    Django>=1.7,<1.8
+    {[base]deps}
+
+[testenv:py33-dj17]
+basepython=python3.3
+deps =
+    Django>=1.7,<1.8
+    {[base]deps}
+
+[testenv:py34-dj17]
+basepython=python3.4
+deps =
+    Django>=1.7,<1.8
     {[base]deps}
 
-[testenv:py27-dj15]
+# django 1.8 on python versions: 2.7, 3.2, 3.3, 3.4, 3.5
+[testenv:py27-dj18]
 basepython=python2.7
 deps =
-    Django>=1.5
+    Django>=1.8,<1.9
     {[base]deps}
 
-[testenv:py32-dj15]
+[testenv:py32-dj18]
 basepython=python3.2
 deps =
-    Django>=1.5
+    Django>=1.8,<1.9
     {[base]deps}
 
-[testenv:py33-dj15]
+[testenv:py33-dj18]
 basepython=python3.3
 deps =
-    Django>=1.5
+    Django>=1.8,<1.9
+    {[base]deps}
+
+[testenv:py34-dj18]
+basepython=python3.4
+deps =
+    Django>=1.8,<1.9
+    {[base]deps}
+
+[testenv:py35-dj18]
+basepython=python3.5
+deps =
+    Django>=1.8,<1.9
+    {[base]deps}
+
+# django 1.9 on python versions: 2.7, 3.4, 3.5
+[testenv:py27-dj19]
+basepython=python2.7
+deps =
+    Django>=1.9,<1.10
+    {[base]deps}
+
+[testenv:py34-dj19]
+basepython=python3.4
+deps =
+    Django>=1.9,<1.10
+    {[base]deps}
+
+[testenv:py35-dj19]
+basepython=python3.5
+deps =
+    Django>=1.9,<1.10
+    {[base]deps}
+
+# django 1.10 on python versions: 2.7, 3.4, 3.5
+[testenv:py27-dj110]
+basepython=python2.7
+deps =
+    Django>=1.10,<1.11
     {[base]deps}
 
-[testenv:pypy19-dj14]
-basepython=pypy
+[testenv:py34-dj110]
+basepython=python3.4
 deps =
-    Django>=1.4,<1.5
+    Django>=1.10,<1.11
     {[base]deps}
 
-[testenv:pypy19-dj15]
-basepython=pypy
+[testenv:py35-dj110]
+basepython=python3.5
 deps =
-    Django>=1.5
+    Django>=1.10,<1.11
     {[base]deps}