diff --git a/src/mibew/libs/classes/Mibew/Maintenance/Installer.php b/src/mibew/libs/classes/Mibew/Maintenance/Installer.php
index 637c878a..0a981dfe 100644
--- a/src/mibew/libs/classes/Mibew/Maintenance/Installer.php
+++ b/src/mibew/libs/classes/Mibew/Maintenance/Installer.php
@@ -30,7 +30,7 @@ class Installer
     /**
      * Minimal PHP version Mibew Messenger works with.
      */
-    const MIN_PHP_VERSION = 50400;
+    const MIN_PHP_VERSION = 70103;
 
     /**
      * Associative array of system configs.