diff --git a/static/demos/light-dark-demo-4/sw.js b/static/demos/light-dark-demo-4/sw.js
index e5d07b2..c9295e2 100644
--- a/static/demos/light-dark-demo-4/sw.js
+++ b/static/demos/light-dark-demo-4/sw.js
@@ -73,7 +73,7 @@ function toggleLightDark(transaction){
                 yeet.onerror = (e)=>{console.error("yeet error",e );res();};
             }
             else {
-                const plonk = obj_store.add({id:1}, 1);
+                const plonk = obj_store.put({id:1}, 1);
                 plonk.onsuccess = res;
                 plonk.onerror = (e)=>{console.error("plonk error", e);res();};
             }