diff --git a/src/index.tsx b/src/index.tsx
index 14e82b9..b25cc0d 100644
--- a/src/index.tsx
+++ b/src/index.tsx
@@ -10,7 +10,7 @@ import * as ChannelService from '@channel.io/channel-web-sdk-loader';
 ChannelService.loadScript();
 
 ChannelService.boot({
-  pluginKey: `${process.env.REACT_APP_CHANNEL_TALK_PLUGIN_KEY}`,
+  pluginKey: `${process.env.CHANNEL_TALK_PLUGIN_KEY}`, // fill your plugin key
 });
 
 const root = CreateDOM.createRoot(document.getElementById('root') as HTMLElement);
diff --git a/webpack.config.js b/webpack.config.js
index 2503889..87782a1 100644
--- a/webpack.config.js
+++ b/webpack.config.js
@@ -67,7 +67,7 @@ module.exports = {
       'process.env.REACT_APP_AUTH_URL': JSON.stringify(process.env.REACT_APP_AUTH_URL),
       'process.env.REACT_APP_APPLY_URL': JSON.stringify(process.env.REACT_APP_APPLY_URL),
       'process.env.REACT_APP_ADMIN_URL': JSON.stringify(process.env.REACT_APP_ADMIN_URL),
-      'process.env.REACT_APP_CHANNEL_TALK_PLUGIN_KEY': JSON.stringify(process.env.REACT_APP_CHANNEL_TALK_PLUGIN_KEY),
+      'process.env.CHANNEL_TALK_PLUGIN_KEY': JSON.stringify(process.env.CHANNEL_TALK_PLUGIN_KEY),
     }),
     new webpack.ProvidePlugin({
       process: 'process/browser.js',