diff --git a/README.md b/README.md
old mode 100644
new mode 100755
index 4f995e8..75d1c8a
--- a/README.md
+++ b/README.md
@@ -57,6 +57,7 @@ If matching_attributes are not set, the list is matched against any type of attr
 - ```string``` (default) - perfect match of a string in the warning list against matching attributes
 - ```substring``` - substring matching of a string in the warning list against matching attributes
 - ```hostname``` - hostname matching (e.g. domain matching from URL) of a string in the warning list against matching attributes
+- ```cidr``` - IP or CDIR block matching in the warning list against matching attributes
 
 # License