diff --git a/lib/consolidate.js b/lib/consolidate.js
index 59eca13..fc736fb 100644
--- a/lib/consolidate.js
+++ b/lib/consolidate.js
@@ -180,8 +180,7 @@ function fromStringRenderer(name) {
 
     return promisify(cb, function (cb) {
       readPartials(path, options, function (err, partials) {
-        const extend = requires.extend || (requires.extend = Object.assign);
-        const opts = extend({}, options);
+        const opts = { ...options };
         opts.partials = partials;
         if (err) return cb(err);
         if (cache(opts)) {
@@ -1421,10 +1420,8 @@ exports.ractive.render = function (str, options, cb) {
       options.template = template;
 
       if (options.data === null || options.data === undefined) {
-        const extend = requires.extend || (requires.extend = Object.assign);
-
         // Shallow clone the options object
-        options.data = extend({}, options);
+        options.data = { ...options };
 
         // Remove consolidate-specific properties from the clone
         let i;