diff --git a/src/POP3.php b/src/POP3.php
index c881a1c3..92d6633e 100644
--- a/src/POP3.php
+++ b/src/POP3.php
@@ -45,6 +45,7 @@ class POP3
      * The POP3 PHPMailer Version number.
      *
      * @var string
+     * @deprecated This constant will be removed in PHPMailer 8.0. Use `PHPMailer::VERSION` instead.
      */
     const VERSION = '7.0.0';
 
diff --git a/src/SMTP.php b/src/SMTP.php
index c3fb54cb..27f02e72 100644
--- a/src/SMTP.php
+++ b/src/SMTP.php
@@ -34,6 +34,7 @@ class SMTP
      * The PHPMailer SMTP version number.
      *
      * @var string
+     * @deprecated This constant will be removed in PHPMailer 8.0. Use `PHPMailer::VERSION` instead.
      */
     const VERSION = '7.0.0';