diff --git a/backend/.dockerignore b/backend/.dockerignore
index 04a9a55..a6e6b58 100644
--- a/backend/.dockerignore
+++ b/backend/.dockerignore
@@ -1,3 +1,4 @@
 __pycache__/
 staticfiles/
+media/
 *.pyc
diff --git a/backend/Dockerfile b/backend/Dockerfile
index d46ec77..7850a65 100644
--- a/backend/Dockerfile
+++ b/backend/Dockerfile
@@ -7,10 +7,12 @@ RUN apt update \
     && rm -rf /var/lib/apt/lists/* \
     && apt clean
 
-COPY ./requirements.txt /app/requirements.txt
-
-RUN pip install -U --no-cache-dir -r requirements.txt
-
 COPY . /app
 
+RUN pip install -U --no-cache-dir -r requirements.txt && \
+    useradd -Mu 1000 righttree && \
+    chown -R righttree:righttree /app
+
 ENV DJANGO_SETTINGS_MODULE="right_tree.settings"
+
+USER righttree
diff --git a/backend/requirements.txt b/backend/requirements.txt
index 665e255..2817ef1 100644
--- a/backend/requirements.txt
+++ b/backend/requirements.txt
@@ -8,6 +8,6 @@ gunicorn==20.1.0
 pandas==1.5.3
 pdfkit==1.0.0
 PyPDF2==1.28.6
-redis==4.5.1
+redis==4.5.3
 celery[redis]==5.2.7
 stripe==5.2.0
diff --git a/backend/right_tree/api/__init__.py b/backend/right_tree/api/__init__.py
index e69de29..53f4ccb 100644
--- a/backend/right_tree/api/__init__.py
+++ b/backend/right_tree/api/__init__.py
@@ -0,0 +1,3 @@
+from .celery import app as celery_app
+
+__all__ = ("celery_app",)
diff --git a/backend/right_tree/api/celery.py b/backend/right_tree/api/celery.py
index 8007ec8..b4e7f42 100644
--- a/backend/right_tree/api/celery.py
+++ b/backend/right_tree/api/celery.py
@@ -1,5 +1,10 @@
+import os
+
 from celery import Celery
 
-app = Celery('righttree')
+
+os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'right_tree.settings')
+
+app = Celery('right_tree')
 app.config_from_object('django.conf:settings', namespace='CELERY')
 app.autodiscover_tasks()
diff --git a/backend/right_tree/api/migrations/0016_alter_activationkey_key_set.py b/backend/right_tree/api/migrations/0016_alter_activationkey_key_set.py
new file mode 100644
index 0000000..258b50b
--- /dev/null
+++ b/backend/right_tree/api/migrations/0016_alter_activationkey_key_set.py
@@ -0,0 +1,19 @@
+# Generated by Django 3.2.17 on 2023-03-29 03:36
+
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('api', '0015_auto_20230306_1620'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='activationkey',
+            name='key_set',
+            field=models.ForeignKey(null=True, on_delete=django.db.models.deletion.PROTECT, to='api.activationkeyset'),
+        ),
+    ]
diff --git a/backend/right_tree/api/models.py b/backend/right_tree/api/models.py
index 8814c35..281a348 100644
--- a/backend/right_tree/api/models.py
+++ b/backend/right_tree/api/models.py
@@ -222,7 +222,7 @@ class ActivationKey(models.Model):
         )
 
     key = models.CharField(max_length=20, unique=True, default=key_default)
-    key_set = models.ForeignKey(ActivationKeySet, on_delete=models.CASCADE, null=True)
+    key_set = models.ForeignKey(ActivationKeySet, on_delete=models.PROTECT, null=True)
     remaining_activations = models.SmallIntegerField(default=1)
     creation_date = models.DateTimeField(auto_now_add=True)
 
diff --git a/backend/right_tree/api/views.py b/backend/right_tree/api/views.py
index 5d0fa52..41baaca 100644
--- a/backend/right_tree/api/views.py
+++ b/backend/right_tree/api/views.py
@@ -239,7 +239,7 @@ def purchase_key(request):
         invoice_creation={
             'enabled': True,
             'invoice_data': {
-                'description': f'Your product code is {key}',
+                'description': f'Your activation key is {key}',
                 'rendering_options': {'amount_tax_display': 'include_inclusive_tax'},
                 'footer': 'BioSphere Capital Limited',
             },
diff --git a/backend/right_tree/settings.py b/backend/right_tree/settings.py
index cf96f59..a5ef862 100644
--- a/backend/right_tree/settings.py
+++ b/backend/right_tree/settings.py
@@ -11,7 +11,6 @@ https://docs.djangoproject.com/en/3.2/ref/settings/
 """
 
 import os
-import stripe
 from pathlib import Path
 
 # Build paths inside the project like this: BASE_DIR / 'subdir'.
diff --git a/docker-compose.production.yaml b/docker-compose.production.yaml
index 6aae0bd..bf94e3d 100644
--- a/docker-compose.production.yaml
+++ b/docker-compose.production.yaml
@@ -6,11 +6,6 @@ volumes:
 
 x-django: &django
   image: right-tree
-  depends_on:
-    postgres:
-      condition: service_healthy
-    redis:
-      condition: service_healthy
   env_file: .env
   user: "$UID:$GID"
   restart: always
@@ -25,6 +20,13 @@ services:
       - gunicorn
       - --bind=0.0.0.0:8000
       - right_tree.wsgi
+    depends_on:
+      postgres:
+        condition: service_healthy
+      redis:
+        condition: service_healthy
+      celery:
+        condition: service_healthy
 
   nginx:
     container_name: nginx
@@ -54,13 +56,13 @@ services:
       - POSTGRES_USER=${POSTGRES_USER}
       - POSTGRES_PASSWORD=${POSTGRES_PASSWORD}
     healthcheck:
-      test: ["CMD", "pg_isready", "--dbname", "righttree", "--username", "righttree"]
+      test: ["CMD", "pg_isready", "--dbname", "$DATABASE_NAME", "--username", "$DATABASE_USER"]
       interval: 10s
       timeout: 5s
       retries: 5
 
   redis:
-    image: redis:7.0.8
+    image: redis:7.0.10
     restart: always
     container_name: redis
     expose:
@@ -84,6 +86,11 @@ services:
         condition: service_healthy
       redis:
         condition: service_healthy
+    healthcheck:
+      test: ["CMD", "celery", "-A", "right_tree.api", "inspect", "ping"]
+      interval: 10s
+      timeout: 5s
+      retries: 5
     deploy:
       resources:
         limits:
diff --git a/docker-compose.yaml b/docker-compose.yaml
index 905e5eb..28143a6 100644
--- a/docker-compose.yaml
+++ b/docker-compose.yaml
@@ -6,11 +6,6 @@ volumes:
 
 x-django: &django
   image: right-tree
-  depends_on:
-    postgres:
-      condition: service_healthy
-    redis:
-      condition: service_healthy
   volumes:
     - ./backend:/app
   env_file: .env
@@ -21,6 +16,13 @@ services:
   backend:
     <<: *django
     container_name: backend
+    depends_on:
+      postgres:
+        condition: service_healthy
+      redis:
+        condition: service_healthy
+      celery:
+        condition: service_healthy
     expose:
       - "8000"
     command:
@@ -56,7 +58,7 @@ services:
     environment:
       POSTGRES_PASSWORD: postgres
     healthcheck:
-      test: ["CMD", "pg_isready", "--dbname", "righttree", "--username", "righttree"]
+      test: ["CMD", "pg_isready", "--dbname", "$DATABASE_NAME", "--username", "$DATABASE_USER"]
       interval: 10s
       timeout: 5s
       retries: 5
@@ -75,7 +77,7 @@ services:
       - 80:80
 
   redis:
-    image: redis:7.0.8
+    image: redis:7.0.10
     restart: unless-stopped
     container_name: redis
     volumes:
@@ -94,14 +96,21 @@ services:
   celery:
     <<: *django
     container_name: celery
+    depends_on:
+      postgres:
+        condition: service_healthy
+      redis:
+        condition: service_healthy
     command:
       - celery
       - -A
       - right_tree.api
       - worker
-    depends_on:
-      redis:
-        condition: service_healthy
+    healthcheck:
+      test: ["CMD", "celery", "-A", "right_tree.api", "inspect", "ping"]
+      interval: 10s
+      timeout: 5s
+      retries: 5
     deploy:
       resources:
         limits: