diff --git a/grumphp.yml b/grumphp.yml
index afa4ecdd9..fd2bfea8b 100644
--- a/grumphp.yml
+++ b/grumphp.yml
@@ -10,4 +10,5 @@ parameters:
     tasks.license.date_from: 2001
 
     tasks.phpcsfixer.allow_risky: false
+    tasks.phpcsfixer.diff: true
     tasks.phpstan.level: 1