diff --git a/docs/documented-method.js b/docs/documented-method.js
index f4a9f48130..d7fee4cdd4 100644
--- a/docs/documented-method.js
+++ b/docs/documented-method.js
@@ -36,8 +36,8 @@
   DocumentedMethod.prototype = {
     // Merge parameters across all overloaded versions of this item.
     _getMergedParams: function() {
-      var paramNames = {};
-      var params = [];
+      const paramNames = {};
+      const params = [];
 
       this.overloads.forEach(function(overload) {
         if (!overload.params) {