diff --git a/styles/config/vocabularies/Technical/accept.txt b/styles/config/vocabularies/Technical/accept.txt
index d5bbc8c..9d1c165 100644
--- a/styles/config/vocabularies/Technical/accept.txt
+++ b/styles/config/vocabularies/Technical/accept.txt
@@ -199,7 +199,7 @@ PgBouncer
 Pgpool
 pgRouting
 plaintext
-playbook(s)
+[Pp]laybook[s]?
 Plesk
 PNG
 Postgre(s|SQL)