diff --git a/avatar/api/__init__.py b/avatar/api/__init__.py
index d087506..e69de29 100644
--- a/avatar/api/__init__.py
+++ b/avatar/api/__init__.py
@@ -1 +0,0 @@
-import avatar.api.signals
diff --git a/avatar/api/apps.py b/avatar/api/apps.py
index f139ac4..34fc212 100644
--- a/avatar/api/apps.py
+++ b/avatar/api/apps.py
@@ -1,6 +1,22 @@
 from django.apps import AppConfig
+from django.db.models import signals
+
+from avatar.models import Avatar
 
 
 class ApiConfig(AppConfig):
     default_auto_field = "django.db.models.BigAutoField"
     name = "avatar.api"
+
+    def ready(self):
+        from .conf import settings as api_settings
+        from .signals import (
+            create_default_thumbnails,
+            remove_previous_avatar_images_when_update,
+        )
+
+        if api_settings.API_AVATAR_CHANGE_IMAGE:
+            signals.pre_save.connect(
+                remove_previous_avatar_images_when_update, sender=Avatar
+            )
+            signals.post_save.connect(create_default_thumbnails, sender=Avatar)
diff --git a/avatar/api/conf.py b/avatar/api/conf.py
index 8e601c5..66b2b06 100644
--- a/avatar/api/conf.py
+++ b/avatar/api/conf.py
@@ -1,5 +1,4 @@
 from appconf import AppConf
-from django.conf import settings
 
 
 class AvatarAPIConf(AppConf):
diff --git a/avatar/api/signals.py b/avatar/api/signals.py
index 14c5dbf..b50f13e 100644
--- a/avatar/api/signals.py
+++ b/avatar/api/signals.py
@@ -1,8 +1,5 @@
 import os
 
-from django.db.models import signals
-
-from avatar.api.conf import settings as api_settings
 from avatar.api.shortcut import get_object_or_none
 from avatar.conf import settings
 from avatar.models import Avatar, invalidate_avatar_cache
@@ -47,10 +44,5 @@ def remove_previous_avatar_images_when_update(
                 if update_main_avatar:
                     if old_instance.avatar.storage.exists(old_instance.avatar.name):
                         old_instance.avatar.storage.delete(old_instance.avatar.name)
-            except FileNotFoundError as e:
+            except FileNotFoundError:
                 pass
-
-
-if api_settings.API_AVATAR_CHANGE_IMAGE:
-    signals.pre_save.connect(remove_previous_avatar_images_when_update, sender=Avatar)
-    signals.post_save.connect(create_default_thumbnails, sender=Avatar)