diff --git a/yamllint/conf/relaxed.yml b/yamllint/conf/relaxed.yml
index 3aac5c9..7ff36c5 100644
--- a/yamllint/conf/relaxed.yml
+++ b/yamllint/conf/relaxed.yml
@@ -21,6 +21,7 @@ rules:
     level: warning
   hyphens: disable
   indentation:
+    level: warning
     indent-sequences: whatever
     check-multi-line-strings: no
   line-length: