diff --git a/src/index.php b/src/index.php
index 8d73697..cb9878e 100644
--- a/src/index.php
+++ b/src/index.php
@@ -12,6 +12,11 @@ define('CONFIG', __DIR__ . '/../config.json');
 // Load composer dependencies
 require_once __DIR__ . '/../vendor/autoload.php';
 
+// Prevent multi-thread execution
+$semaphore = sem_get(
+    crc32(__FILE__), 1
+);
+
 if (false === sem_acquire($semaphore, true))
 {
     exit(
@@ -19,11 +24,6 @@ if (false === sem_acquire($semaphore, true))
     );
 }
 
-// Prevent multi-thread execution
-$semaphore = sem_get(
-    crc32(__FILE__), 1
-);
-
 // Init config
 if (!file_exists(CONFIG))
 {