diff --git a/backend/app/models/category.py b/backend/app/models/category.py
index 52994cc..efe9a18 100644
--- a/backend/app/models/category.py
+++ b/backend/app/models/category.py
@@ -51,5 +51,5 @@ class Category(models.Model):
 
 
 @receiver(post_delete, sender=Category)
-def on_delete_Audiofile(sender, instance: 'Category', using, **kwargs):
+def on_delete_Category(sender, instance: 'Category', using, **kwargs):
     Category.update_json()
diff --git a/backend/app/models/content.py b/backend/app/models/content.py
index ad71d92..3806d1b 100644
--- a/backend/app/models/content.py
+++ b/backend/app/models/content.py
@@ -1,5 +1,7 @@
 from django.conf import settings
 from django.db import models
+from django.db.models.signals import post_delete
+from django.dispatch import receiver
 
 import json
 from tinymce.models import HTMLField
@@ -20,17 +22,13 @@ class Content(models.Model):
 
     def save(self, *args, **kwargs):
         rv = super().save(*args, **kwargs)
-        self.update_json()
+        Content.update_json()
         return rv
 
-    def delete(self, *args, **kwargs):
-        rv = super().delete(*args, **kwargs)
-        self.update_json()
-        return rv
-
-    def update_json(self):
+    @staticmethod
+    def update_json():
         with open(settings.MEDIA_ROOT / 'text.json', 'w') as fp:
-            json.dump(self.asJson(), fp)
+            json.dump(Content.asJson(), fp)
 
     @staticmethod
     def asJson() -> 'dict[str, str]':
@@ -38,3 +36,8 @@ class Content(models.Model):
         for x in Content.objects.all():
             rv[x.pk] = {'title': x.title, 'body': x.body, 'wide': x.wide}
         return rv
+
+
+@receiver(post_delete, sender=Content)
+def on_delete_Content(sender, instance: 'Content', using, **kwargs):
+    Content.update_json()
diff --git a/backend/app/models/place.py b/backend/app/models/place.py
index cf9ac72..8e763cf 100644
--- a/backend/app/models/place.py
+++ b/backend/app/models/place.py
@@ -117,6 +117,6 @@ class Place(models.Model):
 
 
 @receiver(post_delete, sender=Place)
-def on_delete_Audiofile(sender, instance: 'Place', using, **kwargs):
+def on_delete_Place(sender, instance: 'Place', using, **kwargs):
     shutil.rmtree(settings.MEDIA_ROOT / str(instance.pk), ignore_errors=True)
     Place.update_json()