diff --git a/doc/03-cli.md b/doc/03-cli.md
index 7334c0516..fb41879d4 100644
--- a/doc/03-cli.md
+++ b/doc/03-cli.md
@@ -445,6 +445,7 @@ The color coding is as such:
 * **--minor-only (-m):** Only shows packages that have minor SemVer-compatible updates.
 * **--format (-f):** Lets you pick between text (default) or json output format.
 * **--no-dev:** Do not show outdated dev dependencies.
+* **--locked:** Shows updates for packages from the lock file, regardless of what is currently in vendor dir.
 
 ## browse / home
 
diff --git a/src/Composer/Command/OutdatedCommand.php b/src/Composer/Command/OutdatedCommand.php
index b08c3cb46..ace1631d8 100644
--- a/src/Composer/Command/OutdatedCommand.php
+++ b/src/Composer/Command/OutdatedCommand.php
@@ -32,6 +32,7 @@ class OutdatedCommand extends ShowCommand
                 new InputArgument('package', InputArgument::OPTIONAL, 'Package to inspect. Or a name including a wildcard (*) to filter lists of packages instead.'),
                 new InputOption('outdated', 'o', InputOption::VALUE_NONE, 'Show only packages that are outdated (this is the default, but present here for compat with `show`'),
                 new InputOption('all', 'a', InputOption::VALUE_NONE, 'Show all installed packages with their latest versions'),
+                new InputOption('locked', null, InputOption::VALUE_NONE, 'Shows updates for packages from the lock file, regardless of what is currently in vendor dir'),
                 new InputOption('direct', 'D', InputOption::VALUE_NONE, 'Shows only packages that are directly required by the root package'),
                 new InputOption('strict', null, InputOption::VALUE_NONE, 'Return a non-zero exit code when there are outdated packages'),
                 new InputOption('minor-only', 'm', InputOption::VALUE_NONE, 'Show only packages that have minor SemVer-compatible updates. Use with the --outdated option.'),
@@ -78,6 +79,9 @@ EOT
         if ($input->getOption('minor-only')) {
             $args['--minor-only'] = true;
         }
+        if ($input->getOption('locked')) {
+            $args['--locked'] = true;
+        }
         if ($input->getOption('no-dev')) {
             $args['--no-dev'] = true;
         }