diff --git a/app/migrations/versions/42709384216_.py b/app/migrations/versions/42709384216_.py
new file mode 100644
index 0000000..4fa051d
--- /dev/null
+++ b/app/migrations/versions/42709384216_.py
@@ -0,0 +1,26 @@
+"""Removed foreign key constraint
+
+Revision ID: 42709384216
+Revises: 57a00d0b7bc
+Create Date: 2015-06-04 22:34:05.237943
+
+"""
+
+# revision identifiers, used by Alembic.
+revision = '42709384216'
+down_revision = '57a00d0b7bc'
+
+from alembic import op
+import sqlalchemy as sa
+
+
+def upgrade():
+    ### commands auto generated by Alembic - please adjust! ###
+    op.drop_constraint('order_ibfk_1', 'order', type_='foreignkey')
+    ### end Alembic commands ###
+
+
+def downgrade():
+    ### commands auto generated by Alembic - please adjust! ###
+    op.create_foreign_key('order_ibfk_1', 'order', 'user', ['courrier_id'], ['id'])
+    ### end Alembic commands ###
diff --git a/app/models.py b/app/models.py
index 9b2c79a..b4b8d85 100644
--- a/app/models.py
+++ b/app/models.py
@@ -10,7 +10,8 @@ class User(db.Model):
     username = db.Column(db.String(80), unique=True, nullable=False)
     admin = db.Column(db.Boolean)
     bias = db.Column(db.Integer)
-    runs = db.relationship('Order', backref='courrier', lazy='dynamic')
+    runs = db.relation('Order', backref='courrier', primaryjoin='Order.courrier_id==User.id',
+                       foreign_keys='Order.courrier_id')
     orderItems = db.relationship('OrderItem', backref='user', lazy='dynamic')
 
     def configure(self, username, admin, bias):
@@ -76,7 +77,7 @@ class Product(db.Model):
 
 class Order(db.Model):
     id = db.Column(db.Integer, primary_key=True)
-    courrier_id = db.Column(db.Integer, db.ForeignKey('user.id'), nullable=True)
+    courrier_id = db.Column(db.Integer, nullable=True)
     location_id = db.Column(db.Integer, db.ForeignKey('location.id'))
     starttime = db.Column(db.DateTime)
     stoptime = db.Column(db.DateTime)