diff --git a/src/AtolOnline/Constants/Constraints.php b/src/AtolOnline/Constants/Constraints.php
index 588e339..92c1040 100644
--- a/src/AtolOnline/Constants/Constraints.php
+++ b/src/AtolOnline/Constants/Constraints.php
@@ -72,5 +72,5 @@ class Constraints
     /**
      * Регулярное выражание для валидации строки Callback URL
      */
-    const PATTERN_CALLBACK_URL = "^http(s?)\:\/\/[0-9a-zA-Zа-яА-Я]([-.\w]*[0-9a-zA-Zа-яА-Я])*(:(0-9)*)*(\/?)([a-zAZ0-9а-яА-Я\-\.\?\,\'\/\\\+&=%\$#_]*)?$";
+    const PATTERN_CALLBACK_URL = "/^http(s?)\:\/\/[0-9a-zA-Zа-яА-Я]([-.\w]*[0-9a-zA-Zа-яА-Я])*(:(0-9)*)*(\/?)([a-zAZ0-9а-яА-Я\-\.\?\,\'\/\\\+&=%\$#_]*)?$/";
 }
\ No newline at end of file