diff --git a/src/document/scene-document.ts b/src/document/scene-document.ts
index cd9c0372..1658f062 100644
--- a/src/document/scene-document.ts
+++ b/src/document/scene-document.ts
@@ -6,7 +6,8 @@ import type { InteractionLink } from "../interactions/interaction-links";
 import { cloneMaterialRegistry, createStarterMaterialRegistry, type MaterialDef } from "../materials/starter-material-library";
 import { createDefaultWorldSettings, type WorldSettings } from "./world-settings";
 
-export const SCENE_DOCUMENT_VERSION = 20 as const;
+export const SCENE_DOCUMENT_VERSION = 21 as const;
+export const WATER_SURFACE_DISPLACEMENT_SCENE_DOCUMENT_VERSION = 21 as const;
 export const WHITEBOX_BOX_VOLUME_SCENE_DOCUMENT_VERSION = 20 as const;
 export const WHITEBOX_GEOMETRY_SCENE_DOCUMENT_VERSION = 19 as const;
 export const WHITEBOX_FLOAT_TRANSFORM_SCENE_DOCUMENT_VERSION = 18 as const;