diff --git a/app/dexter.pl b/app/dexter.pl
index 0198af5..efdb21a 100755
--- a/app/dexter.pl
+++ b/app/dexter.pl
@@ -120,6 +120,18 @@ helper render_index => sub ($c) {
     my $user = $c->req->env->{REMOTE_USER};
     my $path = $url->path;
     
+    if ( not -d $ROOT_DIRECTORY . $path->to_route ) {
+        $path->trailing_slash(0);
+        $path = $path->to_dir;
+        $url->path($path);
+
+        $c->render(template => 'error',
+                    status  => '404',
+                    message => 'That file does not exist!');
+
+        return 0;
+    }
+
     if ( not user_has_permission_on_path($user, 'READ', $path) ) {
         $c->render(template => 'error',
                     status  => '403',