diff --git a/resources/appendCommitToVersion.js b/resources/appendCommitToVersion.js
index c38a58c6..ef40f330 100644
--- a/resources/appendCommitToVersion.js
+++ b/resources/appendCommitToVersion.js
@@ -11,7 +11,7 @@ var package = JSON.parse(data);
 pvers = package.version.match(/\d+\./g)
 
 // https://circleci.com/docs/2.0/env-vars/#built-in-environment-variables
-package.version = ${pvers[0]}${pvers[1]}${process.env['CIRCLE_BUILD_NUM']}
+package.version = `${pvers[0]}${pvers[1]}${process.env['CIRCLE_BUILD_NUM']}`
 
 
 fs.writeFile('package.json', JSON.stringify(package), err => {