tweak wording
diff --git a/README.md b/README.md
index e499380..e16b79c 100644
--- a/README.md
+++ b/README.md
@@ -6,7 +6,7 @@
 [Orthrus](https://github.com/gmcdonald/orthrus)
 PAM module on its machines/VMs. Orthrus implements
 [RFC 2289](https://tools.ietf.org/html/rfc2289) to offer One Time
-Password (OTP) challenges, in order to `sudo`. This package emits MD5-based
+Password (OTP) challenges, in order to `sudo`. That package emits MD5-based
 challenges (`otp-md5`), so this script only constructs MD5-based responses.
 
 # Usage