diff --git a/app/supporter.rb b/app/supporter.rb
index aff0cabd..ee24d16c 100644
--- a/app/supporter.rb
+++ b/app/supporter.rb
@@ -14,7 +14,6 @@ end
 
 post '/supporter/update' do
   require_login
-
   plan_type = 'supporter'
 
   if is_special_upgrade
diff --git a/views/supporter/_signupcode.erb b/views/supporter/_signupcode.erb
index 0104059f..fc69c2fc 100644
--- a/views/supporter/_signupcode.erb
+++ b/views/supporter/_signupcode.erb
@@ -19,16 +19,27 @@
         }, stripeResponseHandler);
         return false;
       } else {
+        clearCardInfo();
         return true;
       }
     });
 
+    function clearCardInfo() {
+      $('[name="cc_number"]').val('');
+      $('[name="cc_cvc"]').val('');
+      $('[name="cc_exp_month"]').val('');
+      $('[name="cc_exp_year"]').val('');
+      $('[name="cc_name"]').val('');
+      $('[name="cc_type"]').val('');
+    }
+
     function stripeResponseHandler(status, response) {
       if (response.error) {
         $('#plan_error').text(response.error.message).show();
       } else {
         var token = response.id;
         $('#stripe_token').val(token);
+        clearCardInfo();
         $('#upgradeForm').off('submit').submit();
       }
     }