diff --git a/templates/Traefik.pm b/templates/Traefik.pm
index ee53132..f9a893e 100644
--- a/templates/Traefik.pm
+++ b/templates/Traefik.pm
@@ -36,10 +36,16 @@ sub _run {
 
 sub handler {
     my ( $self, $req ) = @_;
+    # See https://gitlab.ow2.org/lemonldap-ng/lemonldap-ng/-/merge_requests/480
     my @convertedHdrs =
       ( 'Content-Length' => 0, Cookie => ( $req->env->{HTTP_COOKIE} // '' ) );
     while ( my ( $k, $v ) = splice( @{ $req->{respHeaders} }, 0, 2 ) ) {
-        push @convertedHdrs, $k, $v;
+        if ( $k =~ /^(?:Deleteheader\d+|Cookie)$/ ) {
+            next;
+        }
+        else {
+            push @convertedHdrs, $k, $v;
+        }
     }
     return [ 200, \@convertedHdrs, [] ];
 }