diff --git a/src/shark/SaveHandler.ts b/src/shark/SaveHandler.ts
index 9041a72..afb146d 100644
--- a/src/shark/SaveHandler.ts
+++ b/src/shark/SaveHandler.ts
@@ -63,6 +63,10 @@ export class SaveHandler extends StaticClass {
 
     const migrators = SaveHandler.migrators.slice(saveVersion);
 
+    if (migrators.length > 0 && localSave !== null) {
+      localStorage.setItem(SaveHandler.saveName + "-backup", localSave);
+    }
+
     let save = loadedSave;
     for (let i = 0; i < migrators.length; i++) {
       console.debug(