diff --git a/cachalot/apps.py b/cachalot/apps.py
index 7e19ef1..20e6dca 100644
--- a/cachalot/apps.py
+++ b/cachalot/apps.py
@@ -9,6 +9,17 @@ VALID_DATABASE_ENGINES = {
     'django.db.backends.sqlite3',
     'django.db.backends.postgresql_psycopg2',
     'django.db.backends.mysql',
+
+    # GeoDjango
+    'django.contrib.gis.db.backends.spatialite',
+    'django.contrib.gis.db.backends.postgis',
+    'django.contrib.gis.db.backends.mysql',
+
+    # django-transaction-hooks
+    'transaction_hooks.backends.sqlite3',
+    'transaction_hooks.backends.postgis',
+    'transaction_hooks.backends.postgresql_psycopg2',
+    'transaction_hooks.backends.mysql',
 }