diff --git a/src/main.rs b/src/main.rs
index 50b0fa8..0479e6e 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -87,10 +87,16 @@ impl Context {
         let relative_path = if relative_path.is_empty() {
             String::new()
         } else {
-            percent_decode_str(&relative_path[1..])
-                .decode_utf8_lossy()
-                .replace('_', " ")
+            let path = percent_decode_str(&relative_path[1..]).decode_utf8_lossy();
+            if path.contains('_') {
+                let path = path.replace('_', " ");
+                let _ = write!(stream, "HTTP/1.1 308 Permanent Redirect\r\n");
+                let _ = write!(stream, "Location: /{path}\r\n\r\n");
+                return;
+            }
+            path.to_string()
         };
+
         let (pk_file, pki_file, start_level) = if !relative_path.is_empty() {
             path.push(&relative_path);
             let (pk_extension, pki_extension) = if let Some(extension) = path.extension() {