diff --git a/ts/index.ts b/ts/index.ts
index 1c0ec1a..28296da 100644
--- a/ts/index.ts
+++ b/ts/index.ts
@@ -22,4 +22,4 @@ if (typeof cmdValue === 'undefined') {
 }
 console.log('command:', cmdValue);
 console.log('node Version:', nodeValue);
-shelljs.exec("bash -x \"source /usr/local/nvm/.nvm.sh && nvm install "+ nodeValue);
\ No newline at end of file
+shelljs.exec("bash -x \"source /usr/local/nvm/.nvm.sh && nvm install "+ nodeValue + "\"");
\ No newline at end of file