diff --git a/README.md b/README.md
index 9a3d11d..87c0a46 100644
--- a/README.md
+++ b/README.md
@@ -56,6 +56,13 @@ To install all pending updates run `mas upgrade`.
 
 To sign into the Mac App Store for the first time run `mas signin`.
 
+    $ mas signin mas@example.com
+    ==> Signing in to Apple ID: mas@example.com
+    Password: 
+
+
+You can also embed your password in the command.
+
     $ mas signin mas@example.com "ZdkM4f$gzF;gX3ABXNLf8KcCt.x.np"
     ==> Signing in to Apple ID: mas@example.com
 
diff --git a/mas-cli/Commands/SignIn.swift b/mas-cli/Commands/SignIn.swift
index 519f1b3..d6626e1 100644
--- a/mas-cli/Commands/SignIn.swift
+++ b/mas-cli/Commands/SignIn.swift
@@ -19,7 +19,14 @@ struct SignInCommand: CommandType {
         
         do {
             print("==> Signing in to Apple ID: \(options.username)")
-            try ISStoreAccount.signIn(username: options.username, password: options.password)
+
+            var password = options.password
+            if password == ""
+            {
+                password = String.fromCString(getpass("Password: "))!
+            }
+
+            try ISStoreAccount.signIn(username: options.username, password: password)
         } catch let error as NSError {
             return .Failure(MASError(code: .SignInError, sourceError: error))
         }
@@ -35,6 +42,6 @@ struct SignInOptions: OptionsType {
     static func evaluate(m: CommandMode) -> Result<SignInOptions, CommandantError<MASError>> {
         return curry(SignInOptions.init)
             <*> m <| Argument(usage: "Apple ID")
-            <*> m <| Argument(usage: "Password")
+            <*> m <| Argument(defaultValue: "", usage: "Password")
     }
 }