diff --git a/doc/authenticator.md b/doc/authenticator.md
index f89d647..c2ff2dd 100644
--- a/doc/authenticator.md
+++ b/doc/authenticator.md
@@ -25,7 +25,7 @@
 - `ReferrerAuthenticator` provides `referrersOnly` method
 - `CollaboratorsAuthenticator` provides `collaboratorsOnly` method
 
-These methods are available in each actions as below:
+These methods are available in each action as below:
 
 ```scala
 // Allows only the repository owner (or manager for group repository) and administrators.