diff --git a/package.json b/package.json
index 1a420ba..0e588e1 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@zennolab_com/capmonstercloud-client",
-  "version": "2.9.2",
+  "version": "2.9.3",
   "description": "Official JS client library for https://capmonster.cloud/ captcha recognition service",
   "main": "dist/index.js",
   "module": "dist/esm/index.js",
diff --git a/tools/self-verify/run.js b/tools/self-verify/run.js
index 250ef59..3563494 100644
--- a/tools/self-verify/run.js
+++ b/tools/self-verify/run.js
@@ -24,7 +24,13 @@ function parseArgs(argv) {
 
 function runCommand(command, args) {
   return new Promise((resolve) => {
-    const child = spawn(command, args, { cwd: ROOT, env: process.env, stdio: ['ignore', 'pipe', 'pipe'] });
+    const child = spawn(command, args, {
+      cwd: ROOT,
+      env: process.env,
+      stdio: ['ignore', 'pipe', 'pipe'],
+      // Windows requires a shell to launch npm.cmd. Arguments here are fixed npm script names.
+      shell: process.platform === 'win32',
+    });
     let stdout = '';
     let stderr = '';
     child.stdout.on('data', (chunk) => {