diff --git a/_sources/index_en.rst b/_sources/index_en.rst
index 07582b56c2..2f206d56e9 100644
--- a/_sources/index_en.rst
+++ b/_sources/index_en.rst
@@ -54,6 +54,7 @@ Contents:
    challenges/Reto03_en.rst
    challenges/Reto04_en.rst
    challenges/Reto05_en.rst
+   challenges/Reto06_en.rst
 
    
 
diff --git a/_sources/lectures/TWP45/TWP45_4.rst b/_sources/lectures/TWP45/TWP45_4.rst
index 27e9990108..da7899b2b6 100644
--- a/_sources/lectures/TWP45/TWP45_4.rst
+++ b/_sources/lectures/TWP45/TWP45_4.rst
@@ -16,7 +16,7 @@ contiene  dominios, nombres y países de la mayoría de las universidades del mu
     import urllib.parse
     import json
 
-    api_url = "https://cors.bridged.cc/http://universities.hipolabs.com/search?"
+    api_url = "http://universities.hipolabs.com/search?"
     parametros = urllib.parse.urlencode({"name": "middle", "country": "turkey"})
 
     solicitud = urllib.request.urlopen(api_url + parametros)
@@ -35,7 +35,7 @@ contiene  dominios, nombres y países de la mayoría de las universidades del mu
     import requests
     import json
 
-    api_url = "https://cors.bridged.cc/http://universities.hipolabs.com/search"
+    api_url = "http://universities.hipolabs.com/search"
     parametros = {"country": "colombia"}
 
     solicitud = requests.get(api_url, params=parametros)
diff --git a/_sources/lectures/TWP45/TWP45_4_en.rst b/_sources/lectures/TWP45/TWP45_4_en.rst
index fae855dda6..52934bc450 100644
--- a/_sources/lectures/TWP45/TWP45_4_en.rst
+++ b/_sources/lectures/TWP45/TWP45_4_en.rst
@@ -16,7 +16,7 @@ domains, names, and countries of most universities around the world.
     import urllib.parse
     import json
 
-    api_url = "https://cors.bridged.cc/http://universities.hipolabs.com/search?"
+    api_url = "http://universities.hipolabs.com/search?"
     params = urllib.parse.urlencode({"name": "middle", "country": "turkey"})
 
     request = urllib.request.urlopen(api_url + params)
@@ -35,7 +35,7 @@ domains, names, and countries of most universities around the world.
     import requests
     import json
 
-    api_url = "https://cors.bridged.cc/http://universities.hipolabs.com/search"
+    api_url = "http://universities.hipolabs.com/search"
     params = {"country": "colombia"}
 
     request = requests.get(api_url, params=params)
diff --git a/_sources/lectures/TWP52.rst b/_sources/lectures/TWP52.rst
index 7e3e88b6ad..f4fa0513f0 100644
--- a/_sources/lectures/TWP52.rst
+++ b/_sources/lectures/TWP52.rst
@@ -259,7 +259,7 @@ revisión
 
 
 
-+ MVC - Modelo, Visión, Control
++ MVC - Modelo, Vista, Controlador
 + Entry()
 + Texto()
 + StringVar()