diff --git a/src/hat.js b/src/hat.js
index a9cf00e42..e87c5b658 100644
--- a/src/hat.js
+++ b/src/hat.js
@@ -2,8 +2,8 @@
 
 exports = module.exports = hat;
 
-var crypto = require('crypto');
+const crypto = require('crypto');
 
-function hat (bits) {
+function hat(bits) {
     return crypto.randomBytes(bits / 8).toString('hex');
 }