diff --git a/.gitignore b/.gitignore
index ad46b30..0406508 100644
--- a/.gitignore
+++ b/.gitignore
@@ -59,3 +59,7 @@ typings/
 
 # next.js build output
 .next
+
+# other
+.node-xmlhttprequest-content-5016
+.node-xmlhttprequest-sync-5016
diff --git a/PULL_REQUEST_TEMPLATE.md b/PULL_REQUEST_TEMPLATE.md
index e85525b..bc52128 100644
--- a/PULL_REQUEST_TEMPLATE.md
+++ b/PULL_REQUEST_TEMPLATE.md
@@ -1,13 +1,13 @@
 ## DESCRIPTION
 
-Nombre:
-Usuario Platzi:
+Nombre: Alfonso Neil Jiménez Casallas
+Usuario Platzi: @alfonsoneiljimenez
 
 ## Ciudad
 - [ ] Ciudad de México
-- [ ] Bogotá
+- [x] Bogotá
 
 # Retos:
-  - [ ] Primer problema
-  - [ ] Segundo problema
-  - [ ] Tercer problema
+  - [x] Primer problema
+  - [x] Segundo problema
+  - [x] Tercer problema
diff --git a/package-lock.json b/package-lock.json
new file mode 100644
index 0000000..e8c8dbc
--- /dev/null
+++ b/package-lock.json
@@ -0,0 +1,13 @@
+{
+  "name": "escuelajs-reto-03",
+  "version": "1.0.0",
+  "lockfileVersion": 1,
+  "requires": true,
+  "dependencies": {
+    "xmlhttprequest": {
+      "version": "1.8.0",
+      "resolved": "https://registry.npmjs.org/xmlhttprequest/-/xmlhttprequest-1.8.0.tgz",
+      "integrity": "sha1-Z/4HXFwk/vOfnWX197f+dRcZaPw="
+    }
+  }
+}
diff --git a/package.json b/package.json
index 65a8bf2..dbaa2f1 100644
--- a/package.json
+++ b/package.json
@@ -24,4 +24,4 @@
   "dependencies": {
     "xmlhttprequest": "^1.8.0"
   }
-}
\ No newline at end of file
+}
diff --git a/src/index.js b/src/index.js
index d6fa599..5845091 100644
--- a/src/index.js
+++ b/src/index.js
@@ -1,32 +1,38 @@
-var XMLHttpRequest = require("xmlhttprequest").XMLHttpRequest;
+const XMLHttpRequest = require("xmlhttprequest").XMLHttpRequest;
 
-var API = 'https://rickandmortyapi.com/api/character/';
-var xhttp = new XMLHttpRequest();
+const API = 'https://rickandmortyapi.com/api/character/';
+const xhttp = new XMLHttpRequest();
 
-function fetchData(url_api, callback) {
-  xhttp.onreadystatechange = function (event) {
-    if (xhttp.readyState === '4') {
-      if (xhttp.status == 200)
-        callback(null, xhttp.responseText);
-      else return callback(url_api);
-    }
-  };
-  xhttp.open('GET', url_api, false);
+
+const fetchData = (url_api) => {
+  xhttp.responseType = 'json';
+  xhttp.open('GET', url_api, true);
   xhttp.send();
-};
+  return new Promise((resolve, reject) => {
+  xhttp.onreadystatechange = (event) => {
+    if (xhttp.readyState === 4) {
+      if (xhttp.status == 200){
+		const response = JSON.parse(xhttp.responseText);  
+        resolve(response);
+	  }
+      else reject(Error(`${url_api} request did not load succesfully`));
+    }
+  }
+ })
+}
+
+fetchData(`${API}`).then(data1 => {
+	console.log(`Primer Llamado...`);
+	console.log(`Personajes: ${data1.info.count}`);
+	return fetchData(`${API}${data1.results[0].id}`)
+}).then(data2 => {
+	console.log(`Segundo Llamado...`);
+	console.log(`Primer Personaje: ${data2.name}`);
+	return fetchData(`${data2.origin.url}`)
+}).then(data3 => {
+	console.log(`Tercer Llamado...`);
+	console.log(`Dimensión: ${data3.dimension}`);
+}).catch(error => {
+  console.log(error)
+})
 
-fetchData(API, function (error1, data1) {
-  if (error1) return console.error('Error' + ' ' + error1);
-  console.log('Primer Llamado...')
-  fetchData(API + data1.results[0].id, function (error2, data2) {
-    if (error2) return console.error(error1);
-    console.log('Segundo Llamado...')
-    fetchData(data2.origin.url, function (error3, data3) {
-      if (error3) return console.error(error3);
-      console.log('Tercero Llamado...')
-      console.log('Personajes:' + ' ' + data1.info.count);
-      console.log('Primer Personaje:' + ' ' + data2.name);
-      console.log('Dimensión:' + ' ' + data3.dimension);
-    });
-  });
-});
\ No newline at end of file