diff --git a/alembic/versions/770149d96e24_nullable_project_for_api_token.py b/alembic/versions/770149d96e24_nullable_project_for_api_token.py
new file mode 100644
index 0000000..6e1f4f2
--- /dev/null
+++ b/alembic/versions/770149d96e24_nullable_project_for_api_token.py
@@ -0,0 +1,35 @@
+"""nullable project for api token
+
+Revision ID: 770149d96e24
+Revises: 987edda096f5
+Create Date: 2017-03-04 18:05:07.956057
+
+"""
+
+# revision identifiers, used by Alembic.
+revision = '770149d96e24'
+down_revision = '987edda096f5'
+
+from alembic import op
+import sqlalchemy as sa
+
+
+def upgrade():
+    """ Make the field 'project_id' of the table tokens be nullable. """
+    op.alter_column(
+        'tokens',
+        'project_id',
+        nullable=True,
+        existing_nullable=False,
+    )
+
+
+def downgrade():
+    """ Make the field 'project_id' of the table tokens be not nullable.
+    """
+    op.alter_column(
+        'tokens',
+        'project_id',
+        nullable=False,
+        existing_nullable=True,
+    )
diff --git a/pagure/lib/model.py b/pagure/lib/model.py
index 2167167..0414aa7 100644
--- a/pagure/lib/model.py
+++ b/pagure/lib/model.py
@@ -2169,7 +2169,7 @@ class Token(BASE):
         sa.ForeignKey(
             'projects.id', onupdate='CASCADE',
         ),
-        nullable=False,
+        nullable=True,
         index=True)
     expiration = sa.Column(
         sa.DateTime, nullable=False, default=datetime.datetime.utcnow)