diff --git a/src/util/util.cr b/src/util/util.cr
index e08bd9d..cb53b46 100644
--- a/src/util/util.cr
+++ b/src/util/util.cr
@@ -11,6 +11,7 @@ SUPPORTED_IMG_TYPES      = %w(
   image/avif
   image/gif
   image/svg+xml
+  image/jxl
 )
 
 def random_str
@@ -49,6 +50,7 @@ def register_mime_types
     #   defiend by Crystal in `MIME.DEFAULT_TYPES`
     ".apng" => "image/apng",
     ".avif" => "image/avif",
+    ".jxl" => "image/jxl",
   }.each do |k, v|
     MIME.register k, v
   end