diff --git a/crowdsourcing/models.py b/crowdsourcing/models.py
index 9445c64..d4b2f92 100644
--- a/crowdsourcing/models.py
+++ b/crowdsourcing/models.py
@@ -1,7 +1,5 @@
 from __future__ import absolute_import
 
-
-import datetime
 import logging
 from math import sin, cos
 from operator import itemgetter
@@ -13,6 +11,7 @@
 except ImportError:
     import json
 
+from django.utils import timezone
 from django.contrib.auth.models import User
 from django.contrib.sites.models import Site
 from django.core.cache import cache
@@ -73,7 +72,7 @@
 
 class LiveSurveyManager(models.Manager):
     def get_query_set(self):
-        now = datetime.datetime.now()
+        now = timezone.now()
         return super(LiveSurveyManager, self).get_query_set().filter(
             is_published=True,
             starts_at__lte=now).filter(
@@ -116,7 +115,7 @@ class Survey(models.Model):
                     "post-close: Results are public on or after the "
                     "\"ends at\" option documented below. never: Results are "
                     "never public."))
-    starts_at = models.DateTimeField(default=datetime.datetime.now)
+    starts_at = models.DateTimeField(default=timezone.now)
     survey_date = models.DateField(blank=True, null=True, editable=False)
     ends_at = models.DateTimeField(null=True, blank=True)
     is_published = models.BooleanField(default=False)
@@ -171,14 +170,14 @@ class Meta:
 
     @property
     def is_open(self):
-        now = datetime.datetime.now()
+        now = timezone.now()
         if self.ends_at:
             return self.starts_at <= now < self.ends_at
         return self.starts_at <= now
 
     @property
     def is_live(self):
-        now = datetime.datetime.now()
+        now = timezone.datetime.now()
         return all([
             self.is_published,
             self.starts_at <= now,
@@ -321,7 +320,7 @@ class Question(models.Model):
         max_length=max([len(key) for key, v in OPTION_TYPE_CHOICES._choices]),
         choices=OPTION_TYPE_CHOICES,
         help_text=_('You must not change this field on a live survey.'))
-    # For NUMERIC_(SELECT|CHOICE) use it as an int unless they use a decimal. 
+    # For NUMERIC_(SELECT|CHOICE) use it as an int unless they use a decimal.
     numeric_is_int = models.BooleanField(default=True, editable=False)
     options = models.TextField(
         blank=True,
@@ -560,7 +559,7 @@ def _extra_from_distance(filter, submission_id_column):
         "%f * cos(latitude / %f) * "
         "cos((longitude - %f) / %f)") % acos_of_args
     # if acos_of >= 1 then the address in the database is practically the
-    # same address we're searching for and acos(acos_of) is mathematically 
+    # same address we're searching for and acos(acos_of) is mathematically
     # impossible so just always include it. If acos_of < 1 then we need to
     # check the distance.
     where = "".join((
@@ -732,7 +731,7 @@ class Submission(models.Model):
     survey = models.ForeignKey(Survey)
     user = models.ForeignKey(User, blank=True, null=True)
     ip_address = models.IPAddressField()
-    submitted_at = models.DateTimeField(default=datetime.datetime.now)
+    submitted_at = models.DateTimeField(default=timezone.now)
     session_key = models.CharField(max_length=40, blank=True, editable=False)
     featured = models.BooleanField(default=False)
 
diff --git a/crowdsourcing/templatetags/crowdsourcing.py b/crowdsourcing/templatetags/crowdsourcing.py
index dc146b8..ed40c09 100644
--- a/crowdsourcing/templatetags/crowdsourcing.py
+++ b/crowdsourcing/templatetags/crowdsourcing.py
@@ -11,7 +11,7 @@
 from django.template import Node
 from django.utils.safestring import mark_safe
 from django.utils.html import escape, strip_tags, linebreaks
-from sorl.thumbnail.base import ThumbnailException
+from sorl.thumbnail.helpers import ThumbnailError
 
 from crowdsourcing.models import (
     extra_from_filters, AggregateResultCount, AggregateResultSum,
@@ -618,7 +618,7 @@ def simple_slideshow(display, question, request_GET, css):
     for answer in answers:
         try:
             image = answer.image_answer.thumbnail_tag
-        except ThumbnailException:
+        except ThumbnailError:
             image = "Can't find %s" % answer.image_answer.url
         out.extend([
             '<li>',
@@ -673,7 +673,7 @@ def submission_fields(submission,
                     args = (thmb, answer.id,)
                     out.append('<img src="%s" id="img_%d" />' % args)
                     x_y = get_image_dimensions(answer.image_answer.file)
-                except ThumbnailException as ex:
+                except ThumbnailError as ex:
                     valid = False
                     out.append('<div class="error">%s</div>' % str(ex))
                 thumb_width = Answer.image_answer_thumbnail_meta["size"][0]
diff --git a/crowdsourcing/urls.py b/crowdsourcing/urls.py
index a474a8a..c859211 100644
--- a/crowdsourcing/urls.py
+++ b/crowdsourcing/urls.py
@@ -1,6 +1,6 @@
 from __future__ import absolute_import
 
-from django.conf.urls.defaults import patterns, url
+from django.conf.urls import patterns, url
 
 from .views import (allowed_actions,
                     embeded_survey_questions,
diff --git a/crowdsourcing_requirements.txt b/crowdsourcing_requirements.txt
index 28349c5..5490068 100644
--- a/crowdsourcing_requirements.txt
+++ b/crowdsourcing_requirements.txt
@@ -4,13 +4,13 @@
 # $ pip install -r crowdsourcing_requirements.txt
 
 # Python Image Library for processing image answers.
-PIL>=1.1.6
+Pillow
 
 # for image thumbnailing
-sorl-thumbnail==3.2.5
+sorl-thumbnail==11.12.1b
 
 # for ordering inlines
--e git://github.com/jpwatts/django-positions.git#egg=django-positions
+django-positions==0.5.1
 
 # For geocoding addresses and address lookups
 geopy
@@ -20,7 +20,7 @@ geopy
 
 # For Flickr support. Crowdsourcing is fairly graceful if you don't install
 # flickrapi.
-flickrapi
+# flickrapi
 
 # For asynchronously synching Flickr. Sync synchronously by default.
 # carrot>=0.10.3