diff --git a/index.php b/index.php
index 862568a..90c82ae 100644
--- a/index.php
+++ b/index.php
@@ -10,7 +10,7 @@ include_once 'core/datetime.php';
 include_once 'core/constants.php';
 
 if (!is_readable(getClassPath(Configuration::class))) {
-  header("Content-Type", "application/json");
+  header("Content-Type: application/json");
   die(json_encode(array( "success" => false, "msg" => "Configuration directory is not readable, check permissions before proceeding." )));
 }