diff --git a/apps/i15-1/src/components/RunPlanButton.tsx b/apps/i15-1/src/components/RunPlanButton.tsx
index 673a39d..74dd8d3 100644
--- a/apps/i15-1/src/components/RunPlanButton.tsx
+++ b/apps/i15-1/src/components/RunPlanButton.tsx
@@ -1,7 +1,11 @@
 import { Button } from "@mui/material";
 import { useState } from "react";
 
-import { useSetActiveTask, useSubmitTask } from "@atlas/blueapi-query";
+import {
+  useGetWorkerState,
+  useSetActiveTask,
+  useSubmitTask,
+} from "@atlas/blueapi-query";
 import type { TaskRequest } from "@atlas/blueapi";
 
 type RunPlanButtonProps = {
@@ -38,12 +42,19 @@ const RunPlanButton = ({
     setLoading(false);
   };
 
+  const isButtonDisabled = () => {
+    const workerState = useGetWorkerState();
+    const disable = workerState.data !== "IDLE";
+    return disable;
+  };
+
   return (
     <Button
       variant="contained"
       loading={loading}
       sx={{ width: "150px" }}
       onClick={handleClick}
+      disabled={isButtonDisabled()}
     >
       {buttonText}
     </Button>
diff --git a/apps/i15-1/src/mocks/handlers.ts b/apps/i15-1/src/mocks/handlers.ts
index a2a3aa7..e2aa2b2 100644
--- a/apps/i15-1/src/mocks/handlers.ts
+++ b/apps/i15-1/src/mocks/handlers.ts
@@ -1,9 +1,11 @@
 import { http, HttpResponse, graphql } from "msw";
 
 const fakeTaskId = "7304e8e0-81c6-4978-9a9d-9046ab79ce3c";
+let workerStatus = { status: "IDLE", duration: 0 };
 
 export const handlers = [
   http.put("/api/worker/task", () => {
+    workerStatus.status = "RUNNING";
     return HttpResponse.json({
       task_id: fakeTaskId,
     });
@@ -18,4 +20,12 @@ export const handlers = [
   http.put("/api/worker/state", () => {
     return HttpResponse.json("IDLE");
   }),
+
+  http.get("/api/worker/state", () => {
+    if (workerStatus.duration >= 10) {
+      workerStatus.status = "IDLE";
+      workerStatus.duration = 0;
+    } else workerStatus.duration++;
+    return HttpResponse.json(workerStatus.status);
+  }),
 ];