diff --git a/assets/js/vendor/values-entries.polyfill.js b/assets/js/vendor/values-entries.polyfill.js
index 6ff2a000..c8896e2f 100644
--- a/assets/js/vendor/values-entries.polyfill.js
+++ b/assets/js/vendor/values-entries.polyfill.js
@@ -1,13 +1,17 @@
 // object-values | MIT | github.com/tc39/proposal-object-values-entries
 
+const reduce = Function.bind.call(Function.call, Array.prototype.reduce);
+const isEnumerable = Function.bind.call(Function.call, Object.prototype.propertyIsEnumerable);
+const concat = Function.bind.call(Function.call, Array.prototype.concat);
+
 if (!Object.values) {
   Object.values = function values(O) {
-    return reduce(keys(O), (v, k) => concat(v, typeof k === 'string' && isEnumerable(O, k) ? [O[k]] : []), []);
+    return reduce(Object.keys(O), (v, k) => concat(v, typeof k === 'string' && isEnumerable(O, k) ? [O[k]] : []), []);
   };
 }
 
 if (!Object.entries) {
   Object.entries = function entries(O) {
-    return reduce(keys(O), (e, k) => concat(e, typeof k === 'string' && isEnumerable(O, k) ? [[k, O[k]]] : []), []);
+    return reduce(Object.keys(O), (e, k) => concat(e, typeof k === 'string' && isEnumerable(O, k) ? [[k, O[k]]] : []), []);
   };
 }