diff --git a/babel.config.js b/babel.config.js
index aabb9b298..03132b114 100644
--- a/babel.config.js
+++ b/babel.config.js
@@ -1,3 +1,5 @@
+'use strict'
+
 module.exports = {
   // Necessary for jest to be able to find the `.babelrc.js` closest to the file
   // instead of only the one in this directory.