diff --git a/src/document/migrate-scene-document.ts b/src/document/migrate-scene-document.ts
index 32af802b..84088266 100644
--- a/src/document/migrate-scene-document.ts
+++ b/src/document/migrate-scene-document.ts
@@ -3106,6 +3106,8 @@ export function migrateProjectDocument(source: unknown): ProjectDocument {
       source.version < PROJECT_NAME_SCENE_DOCUMENT_VERSION;
     const allowMissingEditorPreferences =
       source.version < SCENE_EDITOR_PREFERENCES_SCENE_DOCUMENT_VERSION;
+    const allowMissingTimeSettings =
+      source.version < PROJECT_TIME_SYSTEM_SCENE_DOCUMENT_VERSION;
 
     for (const [sceneKey, sceneValue] of Object.entries(source.scenes)) {
       scenes[sceneKey] = readProjectScene(
@@ -3125,6 +3127,9 @@ export function migrateProjectDocument(source: unknown): ProjectDocument {
       name: readProjectName(source.name, "name", {
         allowMissing: allowMissingProjectName
       }),
+      time: readProjectTimeSettings(source.time, "time", {
+        allowMissing: allowMissingTimeSettings
+      }),
       activeSceneId: expectString(source.activeSceneId, "activeSceneId"),
       scenes,
       materials,