diff --git a/app/models/plugin_datum.py b/app/models/plugin_datum.py
index 8c55045e..22e2b443 100644
--- a/app/models/plugin_datum.py
+++ b/app/models/plugin_datum.py
@@ -1,13 +1,13 @@
 import logging
 from django.db import models
 from django.contrib.postgres import fields
-from django.contrib.auth.models import User
+from django.conf import settings
 
 logger = logging.getLogger('app.logger')
 
 class PluginDatum(models.Model):
     key = models.CharField(max_length=255, help_text="Setting key", db_index=True)
-    user = models.ForeignKey(User, null=True, default=None, on_delete=models.CASCADE, help_text="The user this setting belongs to. If NULL, the setting is global.")
+    user = models.ForeignKey(settings.AUTH_USER_MODEL, null=True, default=None, on_delete=models.CASCADE, help_text="The user this setting belongs to. If NULL, the setting is global.")
     int_value = models.IntegerField(blank=True, null=True, default=None, help_text="Integer value")
     float_value = models.FloatField(blank=True, null=True, default=None, help_text="Float value")
     bool_value = models.NullBooleanField(blank=True, null=True, default=None, help_text="Bool value")
diff --git a/app/models/preset.py b/app/models/preset.py
index 03d7772c..ea5fcbf7 100644
--- a/app/models/preset.py
+++ b/app/models/preset.py
@@ -1,6 +1,6 @@
 import logging
 
-from django.contrib.auth.models import User
+from django.conf import settings
 from django.contrib.postgres.fields import JSONField
 from django.db import models
 from django.utils import timezone
@@ -10,7 +10,7 @@ logger = logging.getLogger('app.logger')
 
 
 class Preset(models.Model):
-    owner = models.ForeignKey(User, blank=True, null=True, on_delete=models.CASCADE, help_text="The person who owns this preset")
+    owner = models.ForeignKey(settings.AUTH_USER_MODEL, blank=True, null=True, on_delete=models.CASCADE, help_text="The person who owns this preset")
     name = models.CharField(max_length=255, blank=False, null=False, help_text="A label used to describe the preset")
     options = JSONField(default=list, blank=True, help_text="Options that define this preset (same format as in a Task's options).",
                                validators=[validate_task_options])
diff --git a/app/models/project.py b/app/models/project.py
index 0b488d6f..f8b6944f 100644
--- a/app/models/project.py
+++ b/app/models/project.py
@@ -1,6 +1,6 @@
 import logging
 
-from django.contrib.auth.models import User
+from django.conf import settings
 from django.db import models
 from django.db.models import Q
 from django.db.models import signals
@@ -18,7 +18,7 @@ logger = logging.getLogger('app.logger')
 
 
 class Project(models.Model):
-    owner = models.ForeignKey(User, on_delete=models.PROTECT, help_text="The person who created the project")
+    owner = models.ForeignKey(settings.AUTH_USER_MODEL, on_delete=models.PROTECT, help_text="The person who created the project")
     name = models.CharField(max_length=255, help_text="A label used to describe the project")
     description = models.TextField(default="", blank=True, help_text="More in-depth description of the project")
     created_at = models.DateTimeField(default=timezone.now, help_text="Creation date")