diff --git a/packages/extension/src/page.ts b/packages/extension/src/page.ts
index b8040822..870372d0 100644
--- a/packages/extension/src/page.ts
+++ b/packages/extension/src/page.ts
@@ -8,10 +8,12 @@ import { MESSAGE_ORIGIN_CONTENT } from '@polkadot/extension-base/defaults';
 import { enable, handleResponse, redirectIfPhishing } from '@polkadot/extension-base/page';
 import { injectExtension } from '@polkadot/extension-inject';
 
+import { packageInfo } from './packageInfo';
+
 function inject () {
   injectExtension(enable, {
     name: 'polkadot-js',
-    version: process.env.PKG_VERSION as string
+    version: packageInfo.version
   });
 }
 
diff --git a/packages/extension/webpack.shared.cjs b/packages/extension/webpack.shared.cjs
index d7ee7a90..be866cc7 100644
--- a/packages/extension/webpack.shared.cjs
+++ b/packages/extension/webpack.shared.cjs
@@ -70,9 +70,7 @@ module.exports = (entry, alias = {}) => ({
     }),
     new webpack.DefinePlugin({
       'process.env': {
-        NODE_ENV: JSON.stringify('production'),
-        PKG_NAME: JSON.stringify(pkgJson.name),
-        PKG_VERSION: JSON.stringify(pkgJson.version)
+        NODE_ENV: JSON.stringify('production')
       }
     }),
     new CopyPlugin({ patterns: [{ from: 'public' }] }),