diff --git a/scripts/run-with-env.mjs b/scripts/run-with-env.mjs
index b71bfb506d7..3d152e91c57 100644
--- a/scripts/run-with-env.mjs
+++ b/scripts/run-with-env.mjs
@@ -4,6 +4,7 @@ import { resolveWindowsTaskkillPath } from "./lib/windows-taskkill.mjs";
 
 const ENV_ASSIGNMENT_RE = /^[A-Za-z_][A-Za-z0-9_]*=/u;
 const USAGE = "Usage: node scripts/run-with-env.mjs KEY=value [KEY=value ...] -- command [args...]";
+const MAX_TIMER_TIMEOUT_MS = 2_147_000_000;
 
 /**
  * Detects help requests before the command separator.
@@ -78,7 +79,7 @@ export function resolveForceKillDelayMs(env = process.env) {
   if (!Number.isSafeInteger(parsed) || parsed < 1) {
     throw new Error("OPENCLAW_RUN_WITH_ENV_FORCE_KILL_MS must be a positive integer");
   }
-  return parsed;
+  return Math.min(parsed, MAX_TIMER_TIMEOUT_MS);
 }
 
 /**
diff --git a/test/scripts/run-with-env.test.ts b/test/scripts/run-with-env.test.ts
index 11fe181ac1b..7635dc91538 100644
--- a/test/scripts/run-with-env.test.ts
+++ b/test/scripts/run-with-env.test.ts
@@ -3,6 +3,7 @@ import { spawn, spawnSync, type ChildProcess } from "node:child_process";
 import { existsSync, mkdtempSync, readFileSync, rmSync } from "node:fs";
 import { tmpdir } from "node:os";
 import path from "node:path";
+import { MAX_TIMER_TIMEOUT_MS } from "@openclaw/normalization-core/number-coercion";
 import { describe, expect, it, vi } from "vitest";
 import {
   isRunWithEnvHelpRequest,
@@ -152,6 +153,11 @@ describe("run-with-env", () => {
   it("rejects malformed force-kill grace configuration before spawning", () => {
     expect(resolveForceKillDelayMs({})).toBe(5_000);
     expect(resolveForceKillDelayMs({ OPENCLAW_RUN_WITH_ENV_FORCE_KILL_MS: "250" })).toBe(250);
+    expect(
+      resolveForceKillDelayMs({
+        OPENCLAW_RUN_WITH_ENV_FORCE_KILL_MS: String(MAX_TIMER_TIMEOUT_MS + 1),
+      }),
+    ).toBe(MAX_TIMER_TIMEOUT_MS);
     for (const value of ["0", "-1", "1e3", "100ms"]) {
       expect(() => resolveForceKillDelayMs({ OPENCLAW_RUN_WITH_ENV_FORCE_KILL_MS: value })).toThrow(
         "OPENCLAW_RUN_WITH_ENV_FORCE_KILL_MS must be a positive integer",
@@ -393,7 +399,10 @@ describe("run-with-env", () => {
         ],
         {
           cwd: process.cwd(),
-          env: { ...process.env, OPENCLAW_RUN_WITH_ENV_FORCE_KILL_MS: "1000" },
+          env: {
+            ...process.env,
+            OPENCLAW_RUN_WITH_ENV_FORCE_KILL_MS: String(MAX_TIMER_TIMEOUT_MS + 1),
+          },
           stdio: "ignore",
         },
       );