diff --git a/InvenTree/InvenTree/settings.py b/InvenTree/InvenTree/settings.py
index d3a5ee919d..24ba9278c8 100644
--- a/InvenTree/InvenTree/settings.py
+++ b/InvenTree/InvenTree/settings.py
@@ -163,7 +163,7 @@ LOGGING = {
     },
 }
 
-MIDDLEWARE = [
+MIDDLEWARE = CONFIG.get('middleware', [
     'django.middleware.security.SecurityMiddleware',
     'django.contrib.sessions.middleware.SessionMiddleware',
     'django.middleware.locale.LocaleMiddleware',
@@ -173,9 +173,12 @@ MIDDLEWARE = [
     'django.contrib.auth.middleware.AuthenticationMiddleware',
     'django.contrib.messages.middleware.MessageMiddleware',
     'django.middleware.clickjacking.XFrameOptionsMiddleware',
-
     'InvenTree.middleware.AuthRequiredMiddleware'
-]
+])
+
+AUTHENTICATION_BACKENDS = CONFIG.get('authentication_backends', [
+    'django.contrib.auth.backends.ModelBackend'
+])
 
 # If the debug toolbar is enabled, add the modules
 if DEBUG and CONFIG.get('debug_toolbar', False):
diff --git a/InvenTree/config_template.yaml b/InvenTree/config_template.yaml
index 1c776a6f7a..0a60e205a1 100644
--- a/InvenTree/config_template.yaml
+++ b/InvenTree/config_template.yaml
@@ -86,4 +86,21 @@ latex:
   enabled: False
   interpreter: pdflatex 
   # Extra options to pass through to the LaTeX interpreter
-  options: ''
\ No newline at end of file
+  options: ''
+
+# Permit custom authentication backends
+#authentication_backends:
+#  - 'django.contrib.auth.backends.ModelBackend'
+
+#  Custom middleware, sometimes needed alongside an authentication backend change.
+#middleware:
+#  - 'django.middleware.security.SecurityMiddleware'
+#  - 'django.contrib.sessions.middleware.SessionMiddleware'
+#  - 'django.middleware.locale.LocaleMiddleware'
+#  - 'django.middleware.common.CommonMiddleware'
+#  - 'django.middleware.csrf.CsrfViewMiddleware'
+#  - 'corsheaders.middleware.CorsMiddleware'
+#  - 'django.contrib.auth.middleware.AuthenticationMiddleware'
+#  - 'django.contrib.messages.middleware.MessageMiddleware'
+#  - 'django.middleware.clickjacking.XFrameOptionsMiddleware'
+#  - 'InvenTree.middleware.AuthRequiredMiddleware'
\ No newline at end of file
diff --git a/InvenTree/stock/views.py b/InvenTree/stock/views.py
index faad9db324..4b62e9903d 100644
--- a/InvenTree/stock/views.py
+++ b/InvenTree/stock/views.py
@@ -1120,7 +1120,8 @@ class StockItemSerialize(AjaxUpdateView):
 
         initials['quantity'] = item.quantity
         initials['serial_numbers'] = item.part.getSerialNumberString(item.quantity)
-        initials['destination'] = item.location.pk
+        if item.location is not None:
+            initials['destination'] = item.location.pk
 
         return initials