diff --git a/index.js b/index.js
index fb36e7a..bf577c2 100644
--- a/index.js
+++ b/index.js
@@ -58,7 +58,7 @@ function loadConfig () {
 
 function getEnvIdFromBranch () {
   try {
-    let branch = sh.exec('git name-rev HEAD --name-only').stdout
+    let branch = sh.exec('git name-rev HEAD --name-only', {silent: true}).stdout
 
     branch = _.last(_.split(branch, '/'))