diff --git a/app/client/predictor.js b/app/client/predictor.js
index 7a05e81..79c4d01 100644
--- a/app/client/predictor.js
+++ b/app/client/predictor.js
@@ -142,6 +142,10 @@ onmessage = async (event) => {
             action.stage = Stage.ACK;
             return;
           }
+          case 'EcsChange': {
+            ecs = new PredictionEcs({Components, Systems});
+            break;
+          }
           case 'Tick': {
             for (const entityId in packet.payload.ecs) {
               if (packet.payload.ecs[entityId]) {