diff --git a/src/rest_framework_api_key/admin.py b/src/rest_framework_api_key/admin.py
index a368b45..2a04d78 100644
--- a/src/rest_framework_api_key/admin.py
+++ b/src/rest_framework_api_key/admin.py
@@ -54,8 +54,3 @@ def save_model(
             messages.add_message(request, messages.WARNING, message)
         else:
             obj.save()
-
-
-admin.site.register(APIKey, APIKeyModelAdmin)
-
-APIKeyAdmin = APIKeyModelAdmin  # Compatibility with <1.3
diff --git a/src/rest_framework_api_key/models.py b/src/rest_framework_api_key/models.py
index 034ea6d..55b7c53 100644
--- a/src/rest_framework_api_key/models.py
+++ b/src/rest_framework_api_key/models.py
@@ -109,6 +109,7 @@ class AbstractAPIKey(models.Model):
 
     class Meta:  # noqa
         abstract = True
+        app_label = 'rest_framework_api_key'
         ordering = ("-created",)
         verbose_name = "API key"
         verbose_name_plural = "API keys"