diff --git a/archivebox/config/common.py b/archivebox/config/common.py
index e9903d41..dfd44a17 100644
--- a/archivebox/config/common.py
+++ b/archivebox/config/common.py
@@ -1,14 +1,12 @@
 __package__ = 'archivebox.config'
 
-import os
 import sys
 import shutil
-import tempfile
 from typing import Dict, Optional
 from pathlib import Path
 
 from rich import print
-from pydantic import Field, field_validator, computed_field, model_validator
+from pydantic import Field, field_validator, computed_field
 from django.utils.crypto import get_random_string
 
 from abx.archivebox.base_configset import BaseConfigSet
diff --git a/archivebox/core/apps.py b/archivebox/core/apps.py
index d29e6266..870a77f8 100644
--- a/archivebox/core/apps.py
+++ b/archivebox/core/apps.py
@@ -12,6 +12,8 @@ class CoreConfig(AppConfig):
         """Register the archivebox.core.admin_site as the main django admin site"""
         from core.admin_site import register_admin_site
         register_admin_site()
+        
+        abx.pm.hook.ready()