diff --git a/sophon/core/models.py b/sophon/core/models.py
index 5075a20..6fd4f84 100644
--- a/sophon/core/models.py
+++ b/sophon/core/models.py
@@ -1,5 +1,6 @@
 from django.db import models
 from django.core import validators
+from django.contrib.auth.models import User
 import pandas
 import pandasdmx
 import pandasdmx.message
@@ -333,6 +334,19 @@ class Project(models.Model):
         default="INTERNAL",
     )
 
+    owner = models.ForeignKey(
+        User,
+        help_text="The user who owns the project, and has full access to it.",
+        on_delete=models.CASCADE,
+    )
+
+    collaborators = models.ManyToManyField(
+        User,
+        help_text="The users who can edit the project.",
+        related_name="collaborates_in",
+        blank=True,
+    )
+
     flows = models.ManyToManyField(
         DataFlow,
         help_text="The DataFlows used in this project.",