diff --git a/CHANGELOG b/CHANGELOG
index 57bed97c..a9227674 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,6 +1,10 @@
-TBR
+2022-08-7
+    Default apps.py file to define the default primary key field
+
+2022-06-10
     Django 4.0 support
 
+
 2021-10-22 3.9.0
     Removed Tracis CI
     Fix SubRegionSerializer URL #257
diff --git a/src/cities_light/apps.py b/src/cities_light/apps.py
new file mode 100644
index 00000000..5339f1f1
--- /dev/null
+++ b/src/cities_light/apps.py
@@ -0,0 +1,5 @@
+from django.apps import AppConfig
+
+class CitiesLightConfig(AppConfig):
+    default_auto_field = 'django.db.models.AutoField'
+    name = 'cities_light'
\ No newline at end of file