diff --git a/app/controllers/instructeurs/dossiers_controller.rb b/app/controllers/instructeurs/dossiers_controller.rb
index caa08f48a..06c6e5ac4 100644
--- a/app/controllers/instructeurs/dossiers_controller.rb
+++ b/app/controllers/instructeurs/dossiers_controller.rb
@@ -15,7 +15,7 @@ module Instructeurs
 
     def attestation
       if dossier.attestation.pdf.attached?
-        redirect_to url_for(dossier.attestation.pdf)
+        redirect_to dossier.attestation.pdf.service_url
       end
     end
 
diff --git a/app/controllers/users/dossiers_controller.rb b/app/controllers/users/dossiers_controller.rb
index 2baaab0fe..df9204e89 100644
--- a/app/controllers/users/dossiers_controller.rb
+++ b/app/controllers/users/dossiers_controller.rb
@@ -49,7 +49,7 @@ module Users
 
     def attestation
       if dossier.attestation&.pdf&.attached?
-        redirect_to url_for(dossier.attestation.pdf)
+        redirect_to dossier.attestation.pdf.service_url
       else
         flash.notice = "L'attestation n'est plus disponible sur ce dossier."
         redirect_to dossier_path(dossier)
diff --git a/app/graphql/types/file.rb b/app/graphql/types/file.rb
index 58b79d083..6f30cd9a9 100644
--- a/app/graphql/types/file.rb
+++ b/app/graphql/types/file.rb
@@ -7,7 +7,7 @@ module Types
     field :content_type, String, null: false
 
     def url
-      Rails.application.routes.url_helpers.url_for(object)
+      object.service_url
     end
   end
 end
diff --git a/app/models/champs/piece_justificative_champ.rb b/app/models/champs/piece_justificative_champ.rb
index 27bda0eb8..35403deb6 100644
--- a/app/models/champs/piece_justificative_champ.rb
+++ b/app/models/champs/piece_justificative_champ.rb
@@ -48,7 +48,7 @@ class Champs::PieceJustificativeChamp < Champ
 
   def for_api
     if piece_justificative_file.attached? && (piece_justificative_file.virus_scanner.safe? || piece_justificative_file.virus_scanner.pending?)
-      Rails.application.routes.url_helpers.url_for(piece_justificative_file)
+      piece_justificative_file.service_url
     end
   end
 end