diff --git a/lib/assets/javascripts/devise/registrations/edit.js b/lib/assets/javascripts/devise/registrations/edit.js
index 1f5c57e..ff38153 100644
--- a/lib/assets/javascripts/devise/registrations/edit.js
+++ b/lib/assets/javascripts/devise/registrations/edit.js
@@ -6,7 +6,7 @@
   
   // Run the input validations when the focus changes
   $("#user_email, #user_recovery_email").blur(function(){
-    let msg = validateEmail($(this).val().trim());
+    var msg = validateEmail($(this).val().trim());
     // If the standard email validation was successful validate that they do not match
     toggleInputError(this, (msg != '' ? msg : validateEmailsDoNotMatch()));
   });
@@ -14,14 +14,14 @@
     toggleInputError(this, validatePassword($(this).val().trim()));
   });
   $("#user_new_password, #user_password_confirmation").blur(function(){
-    let msg = validatePassword($(this).val().trim());
+    var msg = validatePassword($(this).val().trim());
     // If the standard password validation was successful validate that they match
     toggleInputError(this, (msg != '' ? msg : validatePasswordsMatch()));
   });
   
   // Toggle the password field so that its visible/masked
   $("#passwords_show").click(function(){
-    let typ = $("#user_current_password").attr('type');
+    var typ = $("#user_current_password").attr('type');
     $("#user_current_password").attr('type', (typ === 'password' ? 'text' : 'password'));
     $("#user_new_password").attr('type', (typ === 'password' ? 'text' : 'password'));
     $("#user_password_confirmation").attr('type', (typ === 'password' ? 'text' : 'password'));
@@ -33,20 +33,20 @@
   toggleSubmit();
   
   function validateEmailsDoNotMatch(){
-    let email = $("form.register-form #user_email").val().trim();
-    let recovery = $("form.register-form #user_recovery_email").val().trim();
+    var email = $("form.register-form #user_email").val().trim();
+    var recovery = $("form.register-form #user_recovery_email").val().trim();
     return (email === recovery ? (email != '' ? __('Emails must be different') : '') : '');
   }
   
   function validatePasswordsMatch(){
-    let pwd = $("#user_new_password").val().trim();
-    let conf = $("#user_password_confirmation").val().trim();
+    var pwd = $("#user_new_password").val().trim();
+    var conf = $("#user_password_confirmation").val().trim();
     return (pwd != conf ? (pwd != '' ? __('Passwords must match') : '') : '');
   }
   
   // Display the submit button only if there is a valid email and password
   function toggleSubmit(){
-    let disabled = ($("#user_firstname").val().trim().length <= 0 || 
+    var disabled = ($("#user_firstname").val().trim().length <= 0 || 
                     $("#user_surname").val().trim().length <= 0 || 
                     validateEmail($("#user_email").val()) != '' ||
                     validateEmail($("#user_recovery_email").val()) != '' ||
diff --git a/lib/assets/javascripts/home/index.js b/lib/assets/javascripts/home/index.js
index 96ec922..c4b0564 100644
--- a/lib/assets/javascripts/home/index.js
+++ b/lib/assets/javascripts/home/index.js
@@ -13,7 +13,7 @@
     });
     
     // Make the corresponding panel visible and the others hidden
-    let panel = $($(this).attr("href"));
+    var panel = $($(this).attr("href"));
     panel.show().attr("aria-hidden", 'false');
     $.each($(panel).siblings(), function(i, p){
       $(p).hide().attr("aria-hidden", 'true');