diff --git a/rules.yml b/rules.yml
index 41db521c3..aa4c82e29 100644
--- a/rules.yml
+++ b/rules.yml
@@ -11,3 +11,5 @@ first_element: '^[ ]\b(first_element)\b'
 last_element: '^[ ]\b(last_element)\b'
 check_if: '^[ ](\bcheck_if\b)(.*\belse do_check\b)'
 is_set: '^[ ]\b(is_set)\b'
+minimum_length: '^[ ]\b(minimum_length)\b: ([\s\d]+)$'
+maximum_length: '^[ ]\b(maximum_length)\b: ([\s\d]+)$'