diff --git a/tiled/authn_database/migrations/versions/c7bd2573716d_add_session_state_column.py b/tiled/authn_database/migrations/versions/c7bd2573716d_add_session_state_column.py
index be672cedf..dd4e88242 100644
--- a/tiled/authn_database/migrations/versions/c7bd2573716d_add_session_state_column.py
+++ b/tiled/authn_database/migrations/versions/c7bd2573716d_add_session_state_column.py
@@ -19,7 +19,8 @@
 
 def upgrade():
     op.add_column(
-        Session.__tablename__, sa.Column("state", JSONVariant, nullable=False)
+        Session.__tablename__,
+        sa.Column("state", JSONVariant, nullable=False, server_default="{}"),
     )