diff --git a/extensions/json-language-features/server/extension.webpack.config.js b/extensions/json-language-features/server/extension.webpack.config.js
index 37e4207daac..23d653ecb51 100644
--- a/extensions/json-language-features/server/extension.webpack.config.js
+++ b/extensions/json-language-features/server/extension.webpack.config.js
@@ -30,7 +30,7 @@ module.exports = withDefaults({
 	},
 	plugins: [
 		new webpack.NormalModuleReplacementPlugin(
-			/\/vscode-languageserver\/lib\/files\.js/,
+			/\/|\\vscode-languageserver\/|\\lib\/|\\files\.js/,
 			require.resolve('./build/files')
 		),
 		new webpack.IgnorePlugin(/vertx/)