diff --git a/config/services.yaml b/config/services.yaml
index 26873d9..0dde044 100644
--- a/config/services.yaml
+++ b/config/services.yaml
@@ -44,6 +44,3 @@ services:
         arguments:
             $cache: '@cache.user_data'
 
-    App\Service\Wopi\NullProofValidator:
-        decorates: ChampsLibres\WopiLib\Contract\Service\ProofValidatorInterface
-