diff --git a/metadata/com.aidinhut.simpletextcrypt.txt b/metadata/com.aidinhut.simpletextcrypt.txt
index a2be4f283b..a4e555a413 100644
--- a/metadata/com.aidinhut.simpletextcrypt.txt
+++ b/metadata/com.aidinhut.simpletextcrypt.txt
@@ -12,12 +12,17 @@ any of your private data to anyone.
 
 '''Can You Trust it?''' Messages produces by this app is secure and can be
 confidently send over a network, for example. It uses AES in CBC mode with PKCS5
-padding, which is a very powerful encryption. Also it encrypts its settings
-before storing them on the device, which contains the encryption key.
+padding for encryption, and uses PBKDF2 with HMAC, SHA1 and a random Salt in
+order to derive a secure key from the entered password. This is a very powerful
+encryption. Also it encrypts its settings before storing them on the device.
 
-However, the app itself may not be very secure, and probably volunteer to some
+However, the app itself may not be very secure, and probably vulnerable to some
 attacks. Although it is secure enough to stand attacks from non-expert crackers,
 e.g. normal users, it should not be used for serious data encryption.
+
+'''Important Note:''' If you are updating from version 3.X to 4.X, please clean
+your data after upgrade. (Settings -> App -> SimpleTextCrypt -> Clear Data). Or
+else, the app won't work.
 .
 
 Repo Type:git