diff --git a/web/app/controllers/Install.java b/web/app/controllers/Install.java
index f221c78207f8c584367ea419ce40981956bc94bb..79b7350979bd7f1d03786d53d193dfad6f13773c 100644
--- a/web/app/controllers/Install.java
+++ b/web/app/controllers/Install.java
@@ -3,6 +3,8 @@ package controllers;
 import java.io.*;
 import java.util.ArrayList;
 
+import javax.swing.JOptionPane;
+
 import play.*;
 import play.mvc.*;
 import play.data.*;
@@ -31,8 +33,11 @@ public class Install extends Controller {
         String proxyUser = requestData.get("proxyUser");
         String proxyPass = requestData.get("proxyPass");
 
-        if ((inep == null) || (inep.length() < 6) || (inep.length() > 12))
-            return badRequest("Inep inválido");
+        if ((inep == null) || (inep.length() < 6) || (inep.length() > 12)) {
+            Object[] options = { "OK" };
+            JOptionPane.showOptionDialog(null, "Inep inválido.", "Aviso", JOptionPane.DEFAULT_OPTION, JOptionPane.WARNING_MESSAGE, null, options, options[0]);
+            return ok(views.html.install.index.render());
+        }
 
         School school = null;
 
@@ -44,15 +49,17 @@ public class Install extends Controller {
             return internalServerError();
         }
 
-        if (school == null)
-            return badRequest("Inep inválido");
-
+        if (school == null) {
+            Object[] options = { "OK" };
+            JOptionPane.showOptionDialog(null, "Inep inválido.", "Aviso", JOptionPane.DEFAULT_OPTION, JOptionPane.WARNING_MESSAGE, null, options, options[0]);
+            return ok(views.html.install.index.render());
+        }
 
         // build the package
         String command = "sh " + MAKE_PACKAGE_BIN + " " + inep;
         if (useProxy) {
             command += " " + proxyHost + " " + proxyPort + " " +
-                proxyUser + " " + proxyPass;
+            proxyUser + " " + proxyPass;
         }
 
         StringBuffer sb = new StringBuffer();