diff --git a/lib/country_codes.php b/lib/country_codes.php
index 5b2bcd7..e11c67f 100644
--- a/lib/country_codes.php
+++ b/lib/country_codes.php
@@ -1,7 +1,7 @@
 <?php
 class event_country_codes
 {
-    public static function get()
+    public static function get(): array
     {
         return array(
 "AF" => "Afghanistan",