diff --git a/ereuse_devicehub/migrations/versions/378b6b147b46_nullable.py b/ereuse_devicehub/migrations/versions/378b6b147b46_nullable.py
new file mode 100644
index 00000000..5e7472dc
--- /dev/null
+++ b/ereuse_devicehub/migrations/versions/378b6b147b46_nullable.py
@@ -0,0 +1,35 @@
+"""empty message
+
+Revision ID: 378b6b147b46
+Revises: bf600ca861a4
+Create Date: 2020-12-16 11:45:13.339624
+
+"""
+from alembic import context
+from alembic import op
+import sqlalchemy as sa
+import sqlalchemy_utils
+import citext
+import teal
+
+
+# revision identifiers, used by Alembic.
+revision = '378b6b147b46'
+down_revision = 'bf600ca861a4'
+branch_labels = None
+depends_on = None
+
+
+def get_inv():
+    INV = context.get_x_argument(as_dictionary=True).get('inventory')
+    if not INV:
+        raise ValueError("Inventory value is not specified")
+    return INV
+
+def upgrade():
+    op.alter_column('{get_inv()}.computer', 'chassis', nullable=True)
+    # pass
+
+
+def downgrade():
+    pass
diff --git a/ereuse_devicehub/resources/device/models.py b/ereuse_devicehub/resources/device/models.py
index af566eb9..526dd6cd 100644
--- a/ereuse_devicehub/resources/device/models.py
+++ b/ereuse_devicehub/resources/device/models.py
@@ -410,7 +410,7 @@ class Computer(Device):
     ``Server``. The property ``chassis`` defines it more granularly.
     """
     id = Column(BigInteger, ForeignKey(Device.id), primary_key=True)
-    chassis = Column(DBEnum(ComputerChassis), nullable=False)
+    chassis = Column(DBEnum(ComputerChassis), nullable=True)
     chassis.comment = """The physical form of the computer.
 
     It is a subset of the Linux definition of DMI / DMI decode.
diff --git a/ereuse_devicehub/resources/device/schemas.py b/ereuse_devicehub/resources/device/schemas.py
index d3671c1b..db0f3c43 100644
--- a/ereuse_devicehub/resources/device/schemas.py
+++ b/ereuse_devicehub/resources/device/schemas.py
@@ -101,7 +101,7 @@ class Computer(Device):
                           collection_class=OrderedSet,
                           description='The components that are inside this computer.')
     chassis = EnumField(enums.ComputerChassis,
-                        required=True,
+                        required=False,
                         description=m.Computer.chassis.comment)
     ram_size = Integer(dump_only=True,
                        data_key='ramSize',