diff --git a/cSpell.json b/cSpell.json
index f7547c2e6..f7e57abf1 100644
--- a/cSpell.json
+++ b/cSpell.json
@@ -13,6 +13,7 @@
 		"Mindmaps",
 		"mitigations",
 		"Plantuml",
+		"Playfair's",
 		"redmine",
 		"sandboxed",
 		"Sveidqvist",