diff --git a/db/_version.py b/db/_version.py
index a29308f..04cc04e 100644
--- a/db/_version.py
+++ b/db/_version.py
@@ -10,6 +10,9 @@
 
 """Git implementation of _version.py."""
 
+from __future__ import absolute_import, division, print_function, \
+    unicode_literals
+
 import errno
 import os
 import re
diff --git a/db/base/helpers.py b/db/base/helpers.py
index 45d0899..95b9131 100644
--- a/db/base/helpers.py
+++ b/db/base/helpers.py
@@ -50,7 +50,7 @@ def cache_get_key(*args, **kwargs):
     serialise = []
     for arg in args:
         serialise.append(str(arg))
-    for key, arg in kwargs.items():
+    for key, arg in list(kwargs.items()):
         serialise.append(str(key))
     serialise.append(str(arg))
     key = hashlib.md5("".join(serialise)).hexdigest()
diff --git a/db/base/models.py b/db/base/models.py
index c0f1dde..1ad7e52 100644
--- a/db/base/models.py
+++ b/db/base/models.py
@@ -68,7 +68,7 @@ class Satellite(models.Model):
     tle2 = models.CharField(max_length=200, blank=True)
     tle_source = models.CharField(max_length=300, blank=True)
     status = models.CharField(
-        choices=zip(SATELLITE_STATUS, SATELLITE_STATUS), max_length=10, default='alive'
+        choices=list(zip(SATELLITE_STATUS, SATELLITE_STATUS)), max_length=10, default='alive'
     )
     decayed = models.DateTimeField(null=True, blank=True)
 
@@ -112,10 +112,10 @@ class TransmitterEntry(models.Model):
     uuid = ShortUUIDField(db_index=True)
     description = models.TextField()
     status = models.CharField(
-        choices=zip(TRANSMITTER_STATUS, TRANSMITTER_STATUS), max_length=8, default='active'
+        choices=list(zip(TRANSMITTER_STATUS, TRANSMITTER_STATUS)), max_length=8, default='active'
     )
     type = models.CharField(
-        choices=zip(TRANSMITTER_TYPE, TRANSMITTER_TYPE), max_length=11, default='Transmitter'
+        choices=list(zip(TRANSMITTER_TYPE, TRANSMITTER_TYPE)), max_length=11, default='Transmitter'
     )
     uplink_low = models.BigIntegerField(blank=True, null=True)
     uplink_high = models.BigIntegerField(blank=True, null=True)
@@ -205,7 +205,7 @@ class DemodData(models.Model):
         TransmitterEntry, null=True, blank=True, on_delete=models.SET_NULL
     )
     app_source = models.CharField(
-        choices=zip(DATA_SOURCES, DATA_SOURCES), max_length=7, default='sids'
+        choices=list(zip(DATA_SOURCES, DATA_SOURCES)), max_length=7, default='sids'
     )
     data_id = models.PositiveIntegerField(blank=True, null=True)
     payload_frame = models.FileField(upload_to=_name_payload_frame, blank=True, null=True)
diff --git a/db/base/tasks.py b/db/base/tasks.py
index f3024c5..df45278 100644
--- a/db/base/tasks.py
+++ b/db/base/tasks.py
@@ -65,7 +65,7 @@ def update_all_tle():
     norad_ids = set(int(sat.norad_cat_id) for sat in satellites)
 
     # Filter only officially announced NORAD IDs
-    temporary_norad_ids = set(filter(lambda norad_id: norad_id >= 99900, norad_ids))
+    temporary_norad_ids = set([norad_id for norad_id in norad_ids if norad_id >= 99900])
     public_norad_ids = norad_ids - temporary_norad_ids
 
     tles = fetch_tles(public_norad_ids)
@@ -74,7 +74,7 @@ def update_all_tle():
     for satellite in satellites:
         norad_id = satellite.norad_cat_id
 
-        if norad_id not in tles.keys():
+        if norad_id not in list(tles.keys()):
             # No TLE available for this satellite
             missing_norad_ids.append(norad_id)
             continue
diff --git a/db/base/utils.py b/db/base/utils.py
index 5eb0867..682a173 100644
--- a/db/base/utils.py
+++ b/db/base/utils.py
@@ -121,8 +121,8 @@ def calculate_statistics():
     band_label.append('Ka')
     band_data.append(filtered)
 
-    mode_data_sorted, mode_label_sorted = zip(*sorted(zip(mode_data, mode_label), reverse=True))
-    band_data_sorted, band_label_sorted = zip(*sorted(zip(band_data, band_label), reverse=True))
+    mode_data_sorted, mode_label_sorted = list(zip(*sorted(zip(mode_data, mode_label), reverse=True)))
+    band_data_sorted, band_label_sorted = list(zip(*sorted(zip(band_data, band_label), reverse=True)))
 
     statistics = {
         'total_satellites': total_satellites,