diff --git a/pandora/archive/extract.py b/pandora/archive/extract.py
index 26c211cd..fa7e2577 100644
--- a/pandora/archive/extract.py
+++ b/pandora/archive/extract.py
@@ -254,7 +254,7 @@ def stream(video, target, profile, info, audio_track=0, flags={}):
         audio_settings = []
         # mix 2 mono channels into stereo(common for fcp dv mov files)
         if audio_track == 0 and len(info['audio']) == 2 \
-                and len(filter(None, [a['channels'] == 1 or None for a in info['audio']])) == 2:
+                and len(list(filter(None, [a['channels'] == 1 or None for a in info['audio']]))) == 2:
             audio_settings += [
                 '-filter_complex',
                 '[0:%s][0:%s] amerge' % (info['audio'][0]['id'], info['audio'][1]['id'])
@@ -482,8 +482,8 @@ def average_color(prefix, start=0, end=0, mode='antialias'):
         start = int(start * 25)
         end = int(end * 25)
     mode = 'timeline' + mode
-    timelines = ox.sorted_strings(filter(lambda t: t != '%s%s%sp.jpg' % (prefix, mode, height),
-                                  glob("%s%s%sp*.jpg" % (prefix, mode, height))))
+    timelines = ox.sorted_strings(list(filter(lambda t: t != '%s%s%sp.jpg' % (prefix, mode, height),
+                                  glob("%s%s%sp*.jpg" % (prefix, mode, height)))))
     for image in timelines:
         start_offset = 0
         if start and frames + 1500 <= start:
diff --git a/pandora/clip/models.py b/pandora/clip/models.py
index 2e5eda47..54e27be8 100644
--- a/pandora/clip/models.py
+++ b/pandora/clip/models.py
@@ -88,7 +88,7 @@ class MetaClip(object):
             else:
                 self.sortvalue = None
 
-            self.findvalue = '\n'.join(filter(None, [a.findvalue for a in anns]))
+            self.findvalue = '\n'.join(list(filter(None, [a.findvalue for a in anns])))
             for l in [k['id'] for k in settings.CONFIG['layers']]:
                 setattr(self, l, l in anns_by_layer and len(anns_by_layer[l]))
         models.Model.save(self, *args, **kwargs)
diff --git a/pandora/event/models.py b/pandora/event/models.py
index 4ad7a9b1..7fb74244 100644
--- a/pandora/event/models.py
+++ b/pandora/event/models.py
@@ -132,8 +132,8 @@ class Event(models.Model):
             self.set_name_sort()
         self.name_find = '||' + '||'.join((self.name,) + self.alternativeNames) + '||'
         self.name_find = self.name_find.lower()
-        self.defined = len(filter(None, [getattr(self, key)
-                             for key in ('start', 'end')])) > 0
+        self.defined = len(list(filter(None, [getattr(self, key)
+                             for key in ('start', 'end')]))) > 0
         if self.endTime and self.startTime:
             self.durationTime = self.endTime - self.startTime
 
diff --git a/pandora/item/models.py b/pandora/item/models.py
index a37fad91..f4f89747 100644
--- a/pandora/item/models.py
+++ b/pandora/item/models.py
@@ -806,7 +806,7 @@ class Item(models.Model):
                     qs = Annotation.objects.filter(item=self).exclude(findvalue=None)
                     qs = qs.filter(layer=i)
                     qs = qs.order_by('start')
-                    save(i, u'\n'.join(filter(None, [l.findvalue for l in qs])))
+                    save(i, u'\n'.join(list(filter(None, [l.findvalue for l in qs]))))
                     layer_keys.append(i)
                 elif i != '*' and i not in self.facet_keys:
                     value = self.get(i)