diff --git a/book/security.rst b/book/security.rst
index 7016c00a5ed..1244b337e5b 100644
--- a/book/security.rst
+++ b/book/security.rst
@@ -507,7 +507,7 @@ else, you'll want to encode their passwords. The best algorithm to use is
 
 .. include:: /cookbook/security/_ircmaxwell_password-compat.rst.inc
 
-Of course, your user's passwords now need to be encoded with this exact algorithm.
+Of course, your users' passwords now need to be encoded with this exact algorithm.
 For hardcoded users, you can use an `online tool`_, which will give you something
 like this: