diff --git a/lib/apn_on_rails/app/models/apn/app.rb b/lib/apn_on_rails/app/models/apn/app.rb
index 29a813d5..59354b39 100644
--- a/lib/apn_on_rails/app/models/apn/app.rb
+++ b/lib/apn_on_rails/app/models/apn/app.rb
@@ -31,8 +31,8 @@ def self.send_notifications
     apps.each do |app|
       app.send_notifications
     end
-    global_cert = File.read(configatron.apn.cert)
-    if global_cert
+    if !configatron.apn.cert.blank?
+      global_cert = File.read(configatron.apn.cert)
       send_notifications_for_cert(global_cert, nil)
     end
   end
@@ -123,8 +123,8 @@ def self.process_devices
     apps.each do |app|
       app.process_devices
     end
-    global_cert = File.read(configatron.apn.cert)
-    if global_cert
+    if !configatron.apn.cert.blank?
+      global_cert = File.read(configatron.apn.cert)
       APN::App.process_devices_for_cert(global_cert)
     end
   end