diff --git a/typos.toml b/typos.toml
index 40fa9f83..f76d002d 100644
--- a/typos.toml
+++ b/typos.toml
@@ -1,4 +1,6 @@
 [default.extend-words]
+PN = "PN"
+substituters = "substituters"
 
 [files]
 extend-exclude = ["CHANGELOG.md", "**.js", "**.svg", "doc/talks/*"]