diff --git a/user_guide/libraries/encryption.html b/user_guide/libraries/encryption.html
index b27a376..d541174 100644
--- a/user_guide/libraries/encryption.html
+++ b/user_guide/libraries/encryption.html
@@ -75,7 +75,7 @@
 
 <p>A <em>key</em> is a piece of information that controls the cryptographic process and permits an encrypted string to be decoded. 
 In fact, the key you chose will provide the <strong>only</strong> means to decode data that was encrypted with that key,
-so not only must you chose the key carefully, you must must never change it if you intend use it for persistent data.</p>
+so not only must you chose the key carefully, you must never change it if you intend use it for persistent data.</p>
 
 <p>It goes without saying that you should guard your key carefully.
 Should someone gain access to your key, the data will be easily decoded.  If your server is not totally under your control