diff --git a/README.md b/README.md
index 02e30c77d..448e280d6 100644
--- a/README.md
+++ b/README.md
@@ -134,7 +134,7 @@ engine.registerTag('upper', {
     },
     render: function(scope, hash) {
         var str = Liquid.evalValue(this.str, scope); // 'alice'
-        return str.toUpperCase(); // 'Alice'
+        return Promise.resolve(str.toUpperCase()); // 'Alice'
     }
 });
 ```
@@ -223,18 +223,6 @@ Documentation: <https://shopify.github.io/liquid/basics/operators/>
 
 `==`, `!=`, `>`, `<`, `>=`, `<=`, `or`, `and`, `contains`.
 
-## Async Support
-
-harttle/shopify-liquid do NOT support async rendering, this is by design.
-
-The primary principle of harttle/shopify-liquid is EASY TO EXTEND.
-Async rendering introduces extra complexity in both implementation and extension.
-
-For template-driven projects, checkout these Liquid-like engines:
-
-* liquid-node: <https://github.com/sirlantis/liquid-node> 
-* nunjucks: <http://mozilla.github.io/nunjucks/>
-
 [nunjucks]: http://mozilla.github.io/nunjucks/
 [liquid-node]: https://github.com/sirlantis/liquid-node
 [shopify-liquid]: https://shopify.github.io/liquid/