diff --git a/lib/get-repository-url.js b/lib/get-repository-url.js
index c943f2d..2272b55 100644
--- a/lib/get-repository-url.js
+++ b/lib/get-repository-url.js
@@ -1,3 +1,5 @@
+'use strict'
+
 module.exports = function (git) {
   const pkg = git.getRepoPackage()
   if (!pkg.repository) {