diff --git a/src/helper/util.js b/src/helper/util.js
index 1aad995..a2dadda 100644
--- a/src/helper/util.js
+++ b/src/helper/util.js
@@ -16,10 +16,8 @@ const memoize = fun => {
   let cache = [];
   return input => {
     if (cache[input] !== undefined) return cache[input];
-    fun(input).then(res => {
-      cache[input] = res;
-      return cache[input];
-    });
+    cache[input] = fun(input);
+    return cache[input];
   };
 };
 
diff --git a/src/index.js b/src/index.js
index ded4364..42b0d20 100644
--- a/src/index.js
+++ b/src/index.js
@@ -5,10 +5,10 @@ const outputField = document.querySelector('input[name=response]');
 const inputString = document.querySelector('input[name=request]');
 
 const updateInputField = () => {
-  let res = postRequest(inputString.value);
-
-  outputField.value = res;
-  inputString.value = '';
+  postRequest(inputString.value).then(res => {
+    outputField.value = res.body;
+    inputString.value = '';
+  });
 };
 
 const changeDisplayMsg = () => {