diff --git a/migrations/versions/20251127_0002_stage_changed_activity_enum.py b/migrations/versions/20251127_0002_stage_changed_activity_enum.py
new file mode 100644
index 0000000..c5e0115
--- /dev/null
+++ b/migrations/versions/20251127_0002_stage_changed_activity_enum.py
@@ -0,0 +1,26 @@
+"""Add stage_changed activity type."""
+from __future__ import annotations
+
+from alembic import op
+
+# revision identifiers, used by Alembic.
+revision: str = "20251127_0002_stage_changed"
+down_revision: str | None = "20251122_0001"
+branch_labels: tuple[str, ...] | None = None
+depends_on: tuple[str, ...] | None = None
+
+
+def upgrade() -> None:
+    op.execute("ALTER TYPE activity_type ADD VALUE IF NOT EXISTS 'stage_changed';")
+
+
+def downgrade() -> None:
+    op.execute("UPDATE activities SET type = 'status_changed' WHERE type = 'stage_changed';")
+    op.execute("ALTER TYPE activity_type RENAME TO activity_type_old;")
+    op.execute(
+        "CREATE TYPE activity_type AS ENUM ('comment','status_changed','task_created','system');"
+    )
+    op.execute(
+        "ALTER TABLE activities ALTER COLUMN type TYPE activity_type USING type::text::activity_type;"
+    )
+    op.execute("DROP TYPE activity_type_old;")