diff --git a/website/channels.php b/website/channels.php
index a061157..e8bdbe1 100644
--- a/website/channels.php
+++ b/website/channels.php
@@ -7,13 +7,23 @@
         }
     }
 
+    if (!function_exists('str_ends_with')) {
+        function str_ends_with($haystack, $needle)
+        {
+            $length = strlen($needle);
+            return $length > 0 ? substr($haystack, -$length) === $needle : true;
+        }
+    }
+
     $uri = $_SERVER['REQUEST_URI'];
     $uri = str_replace('/channels/', '', $uri);
     $prefix = '/mnt/HDD0/YouTube_captions_search_engine/channels/';
     if (str_contains($uri, '/')) {
         $uri = str_replace('/', '#', $uri);
         $uri = $prefix . $uri;
-        header('Content-Type: application/json; charset=UTF-8');
+        if (str_ends_with($uri, '.json')) {
+            header('Content-Type: application/json; charset=UTF-8');
+        }
         echo file_get_contents("zip://$uri");
     } else {
         $uri = $prefix . $uri;