diff --git a/src/handlers/proxy.rs b/src/handlers/proxy.rs
index 2bfad2b..8ae21da 100644
--- a/src/handlers/proxy.rs
+++ b/src/handlers/proxy.rs
@@ -1,5 +1,5 @@
 use actix_web::{error::ErrorInternalServerError, web, HttpRequest, HttpResponse, Result};
-use log::warn;
+use log::{error, warn};
 
 use crate::app_state::AppState;
 use crate::handlers::serve_file::serve_file;
@@ -37,7 +37,10 @@ pub async fn proxy_handler(
             "aac" => "audio/aac",
             "m4a" => "audio/m4a",
             "flac" => "audio/flac",
-            _ => return Err(ErrorInternalServerError("unsupported file format")),
+            _ => {
+                error!("unsupported file format");
+                return Err(ErrorInternalServerError("unsupported file format"));
+            },
         };
 
         warn!("content_type: {}", content_type);