diff --git a/taiga/users/migrations/0025_user_uuid.py b/taiga/users/migrations/0025_user_uuid.py
new file mode 100644
index 00000000..82106ef0
--- /dev/null
+++ b/taiga/users/migrations/0025_user_uuid.py
@@ -0,0 +1,35 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.11.2 on 2017-10-31 14:57
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+import taiga.users.models
+import uuid
+
+
+def update_uuids(apps, schema_editor):
+    User = apps.get_model("users", "User")
+    for user in User.objects.all():
+        user.uuid = uuid.uuid4().hex
+        user.save()
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('users', '0024_auto_20170406_0727'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='user',
+            name='uuid',
+            field=models.CharField(default=taiga.users.models.get_default_uuid, editable=False, max_length=32),
+        ),
+        migrations.RunPython(update_uuids, lambda apps, schema_editor: None),
+        migrations.AlterField(
+            model_name='user',
+            name='uuid',
+            field=models.CharField(default=taiga.users.models.get_default_uuid, editable=False, max_length=32, unique=True),
+        ),
+    ]
diff --git a/taiga/users/models.py b/taiga/users/models.py
index 9bf72000..ceb0ee1e 100644
--- a/taiga/users/models.py
+++ b/taiga/users/models.py
@@ -19,6 +19,7 @@
 from importlib import import_module
 
 import random
+import uuid
 import re
 
 from django.apps import apps
@@ -125,7 +126,13 @@ class PermissionsMixin(models.Model):
         return self.is_superuser
 
 
+def get_default_uuid():
+    return uuid.uuid4().hex
+
+
 class User(AbstractBaseUser, PermissionsMixin):
+    uuid = models.CharField(max_length=32, editable=False, null=False,
+                            blank=False, unique=True, default=get_default_uuid)
     username = models.CharField(_("username"), max_length=255, unique=True,
         help_text=_("Required. 30 characters or fewer. Letters, numbers and "
                     "/./-/_ characters"),
diff --git a/taiga/users/serializers.py b/taiga/users/serializers.py
index 36d9a5a8..6e021c07 100644
--- a/taiga/users/serializers.py
+++ b/taiga/users/serializers.py
@@ -78,6 +78,7 @@ class UserAdminSerializer(UserSerializer):
     total_private_projects = MethodField()
     total_public_projects = MethodField()
     email = Field()
+    uuid = Field()
     max_private_projects = Field()
     max_public_projects = Field()
     max_memberships_private_projects = Field()