diff --git a/Android/app/src/main/java/com/example/mathseduc/controllers/ControllerChapter.kt b/Android/app/src/main/java/com/example/mathseduc/controllers/ControllerChapter.kt
index e63a5f9..52152b3 100644
--- a/Android/app/src/main/java/com/example/mathseduc/controllers/ControllerChapter.kt
+++ b/Android/app/src/main/java/com/example/mathseduc/controllers/ControllerChapter.kt
@@ -11,14 +11,15 @@ import java.io.IOException
 
 class ControllerChapter {
     companion object {
+
+        // Client HTTP API
+        val client = OkHttpClient()
+
         fun getChapters(): ArrayList<Chapter>? {
 
             val policy = StrictMode.ThreadPolicy.Builder().permitAll().build()
             StrictMode.setThreadPolicy(policy)
 
-            // Client HTTP API
-            val client = OkHttpClient()
-
             // API Access
             val request = Request.Builder()
                 .url("https://trusting-panini.87-106-126-109.plesk.page/api/all/chapters/qUOGkWdoPCgbmuqxIC8xiaX0rV1Pw1LoPafkaoHOgszEyD9P2vcOu493xCDZpAqO/1")
@@ -45,9 +46,6 @@ class ControllerChapter {
             val policy = StrictMode.ThreadPolicy.Builder().permitAll().build()
             StrictMode.setThreadPolicy(policy)
 
-            // Client HTTP API
-            val client = OkHttpClient()
-
             // API Access
             val request = Request.Builder()
                 .url("https://trusting-panini.87-106-126-109.plesk.page/api/chapters/$idchapter/qUOGkWdoPCgbmuqxIC8xiaX0rV1Pw1LoPafkaoHOgszEyD9P2vcOu493xCDZpAqO")
@@ -62,8 +60,7 @@ class ControllerChapter {
                 val typeTokenProduct = object : TypeToken<ArrayList<Chapter>>() {}.type
 
                 // Parse API response and return the list of chapters
-                val chapter: ArrayList<Chapter> = gson.fromJson(response.body!!.string(), typeTokenProduct)
-                return chapter[0].name
+                return (gson.fromJson(response.body!!.string(), typeTokenProduct) as  ArrayList<Chapter>)[0].name
             }
 
             return null