diff --git a/.gitignore b/.gitignore
index bc8a670..dd3bc04 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,2 @@
-.idea/*
\ No newline at end of file
+.idea/*
+passwd.bin
\ No newline at end of file
diff --git a/README.md b/README.md
index ab9533f..ee1ae4f 100644
--- a/README.md
+++ b/README.md
@@ -34,6 +34,16 @@ Get device encryption status and cipher suites used.
 ```
 You will be asked to enter the unlock password. If everything is fine device will be unlocked.
 
+```
+-us, --unlock_with_saved_passwd Unlock with the password saved
+```
+Unlock using the saved password. If everything is fine device will be unlocked.
+
+```
+-sp, --save_passwd    Save password
+```
+When unlock password, it will save user password to passwd.bin, so you can use "-us" for next time to auto unlock.
+
 ```
 -m, --mount           Enable mount point for an unlocked device
 ```