diff --git a/docs/maintainers/handbook.md b/docs/maintainers/handbook.md
index 3832cc8..6409be0 100644
--- a/docs/maintainers/handbook.md
+++ b/docs/maintainers/handbook.md
@@ -27,7 +27,7 @@ This is a [compose specification](https://compose-spec.io/) compliant file that
 
 ### `.env.sample`
 
-This file is a skeleton for environmental variables that should be adjusted by the user. Examples include: domain or php extention list. Whenever you create a new app with `abra app new` this file gets copied to the `~/.abra/servers/<server-domain>/<app-domain>.env` and when you run `abra app config <app-domain>` you're editing this file.
+This file is a skeleton for environmental variables that should be adjusted by the user. Examples include: domain or PHP extension list. Whenever you create a new app with `abra app new` this file gets copied to the `~/.abra/servers/<server-domain>/<app-domain>.env` and when you run `abra app config <app-domain>` you're editing this file.
 
 ### `abra.sh`