diff --git a/src/Application/Cli/DeployCommand.php b/src/Application/Cli/DeployCommand.php
index ae3cb60a..41609e74 100644
--- a/src/Application/Cli/DeployCommand.php
+++ b/src/Application/Cli/DeployCommand.php
@@ -82,6 +82,13 @@ protected function configure()
                 null,
                 InputOption::VALUE_REQUIRED,
                 'Target branch in which to deploy the website.'
+            )
+            ->addOption(
+                'config',
+                null,
+                InputOption::VALUE_REQUIRED | InputOption::VALUE_IS_ARRAY,
+                'If specified will override entries in couscous.yml (key=value)',
+                []
             );
     }
 
@@ -93,9 +100,12 @@ protected function execute(InputInterface $input, OutputInterface $output)
         $sourceDirectory = $input->getArgument('source');
         $repositoryUrl = $input->getOption('repository');
         $targetBranch = $input->getOption('branch');
+        $cliConfig = $input->getOption('config');
 
         $project = new Project($sourceDirectory, getcwd().'/.couscous/generated');
 
+        $project->metadata['cliConfig'] = $cliConfig;
+
         // Generate the website
         $this->generator->generate($project, $output);
 
diff --git a/src/Application/Cli/GenerateCommand.php b/src/Application/Cli/GenerateCommand.php
index 9190a2a6..4afcf7e8 100644
--- a/src/Application/Cli/GenerateCommand.php
+++ b/src/Application/Cli/GenerateCommand.php
@@ -46,13 +46,24 @@ protected function configure()
                 InputOption::VALUE_REQUIRED,
                 'Target directory in which to generate the files.',
                 getcwd().'/.couscous/generated'
+            )
+            ->addOption(
+                'config',
+                null,
+                InputOption::VALUE_REQUIRED | InputOption::VALUE_IS_ARRAY,
+                'If specified will override entries in couscous.yml (key=value)',
+                []
             );
     }
 
     protected function execute(InputInterface $input, OutputInterface $output)
     {
+        $cliConfig = $input->getOption('config');
+
         $project = new Project($input->getArgument('source'), $input->getOption('target'));
 
+        $project->metadata['cliConfig'] = $cliConfig;
+
         $this->generator->generate($project, $output);
     }
 }
diff --git a/src/Application/Cli/PreviewCommand.php b/src/Application/Cli/PreviewCommand.php
index 21bf977d..d4619c2e 100644
--- a/src/Application/Cli/PreviewCommand.php
+++ b/src/Application/Cli/PreviewCommand.php
@@ -64,6 +64,13 @@ protected function configure()
                 null,
                 InputOption::VALUE_OPTIONAL,
                 'If set livereload server is launched from the specified path (global livereload by default)'
+            )
+            ->addOption(
+                'config',
+                null,
+                InputOption::VALUE_REQUIRED | InputOption::VALUE_IS_ARRAY,
+                'If specified will override entries in couscous.yml (key=value)',
+                []
             );
     }
 
@@ -72,6 +79,8 @@ protected function configure()
      */
     protected function execute(InputInterface $input, OutputInterface $output)
     {
+        $cliConfig = $input->getOption('config');
+
         if (!$this->isSupported()) {
             $output->writeln('<error>PHP 5.4 or above is required to run the internal webserver</error>');
 
@@ -95,7 +104,7 @@ protected function execute(InputInterface $input, OutputInterface $output)
             $this->startLivereload($input->getOption('livereload'), $output, $sourceDirectory, $targetDirectory);
         }
 
-        $watchlist = $this->generateWebsite($output, $sourceDirectory, $targetDirectory);
+        $watchlist = $this->generateWebsite($output, $sourceDirectory, $targetDirectory, $cliConfig);
 
         $serverProcess = $this->startWebServer($input, $output, $targetDirectory);
         $throwOnServerStop = true;
@@ -112,7 +121,6 @@ protected function execute(InputInterface $input, OutputInterface $output)
             }
         }
 
-
         // Watch for changes
         while ($serverProcess->isRunning()) {
             $files = $watchlist->getChangedFiles();
@@ -121,7 +129,7 @@ protected function execute(InputInterface $input, OutputInterface $output)
                 $output->write(sprintf('<comment>%d file(s) changed: regenerating</comment>', count($files)));
                 $output->writeln(sprintf(' (%s)', $this->fileListToDisplay($files, $sourceDirectory)));
 
-                $watchlist = $this->generateWebsite($output, $sourceDirectory, $targetDirectory, true);
+                $watchlist = $this->generateWebsite($output, $sourceDirectory, $targetDirectory, $cliConfig, true);
             }
 
             sleep(1);
@@ -138,10 +146,12 @@ private function generateWebsite(
         OutputInterface $output,
         $sourceDirectory,
         $targetDirectory,
+        $cliConfig,
         $regenerate = false
     ) {
         $project = new Project($sourceDirectory, $targetDirectory);
 
+        $project->metadata['cliConfig'] = $cliConfig;
         $project->metadata['preview'] = true;
 
         $project->regenerate = $regenerate;
diff --git a/src/Application/config.php b/src/Application/config.php
index cb6325ba..52b9ecc2 100644
--- a/src/Application/config.php
+++ b/src/Application/config.php
@@ -8,6 +8,7 @@
     'steps' => [
         DI\get('Couscous\Module\Config\Step\SetDefaultConfig'),
         DI\get('Couscous\Module\Config\Step\LoadConfig'),
+        DI\get('Couscous\Module\Config\Step\OverrideConfigFromCLI'),
         DI\get('Couscous\Module\Config\Step\OverrideBaseUrlForPreview'),
 
         DI\get('Couscous\Module\Scripts\Step\ExecuteBeforeScripts'),
diff --git a/src/Module/Config/Step/OverrideConfigFromCLI.php b/src/Module/Config/Step/OverrideConfigFromCLI.php
new file mode 100644
index 00000000..0e2fc938
--- /dev/null
+++ b/src/Module/Config/Step/OverrideConfigFromCLI.php
@@ -0,0 +1,43 @@
+<?php
+
+namespace Couscous\Module\Config\Step;
+
+use Couscous\Model\Project;
+use Psr\Log\LoggerInterface;
+
+/**
+ * Override config variables when specified using --config option.
+ *
+ * @author D.J. Marcolesco <dj.marcolesco@gmail.com>
+ */
+class OverrideConfigFromCLI implements \Couscous\Step
+{
+    /**
+     * @var LoggerInterface
+     */
+    private $logger;
+
+    public function __construct(LoggerInterface $logger)
+    {
+        $this->logger = $logger;
+    }
+
+    public function __invoke(Project $project)
+    {
+        if (!$project->metadata['cliConfig']) {
+            return;
+        }
+
+        $cliConfig = [];
+        foreach ($project->metadata['cliConfig'] as $item) {
+            $explosion = explode('=', $item, 2);
+            $this->logger->notice('Overriding global config: '.$explosion[0].' = "'.$explosion[1].'"');
+
+            $cliConfig[$explosion[0]] = $explosion[1];
+        }
+
+        unset($project->metadata['cliConfig']);
+
+        $project->metadata->setMany($cliConfig);
+    }
+}
diff --git a/tests/UnitTest/Module/Config/Step/OverrideConfigFromCLITest.php b/tests/UnitTest/Module/Config/Step/OverrideConfigFromCLITest.php
new file mode 100644
index 00000000..6e12fb2b
--- /dev/null
+++ b/tests/UnitTest/Module/Config/Step/OverrideConfigFromCLITest.php
@@ -0,0 +1,62 @@
+<?php
+
+namespace Couscous\Tests\UnitTest\Module\Config\Step;
+
+use Couscous\Module\Config\Step\OverrideConfigFromCLI;
+use Couscous\Tests\UnitTest\Mock\MockProject;
+
+/**
+ * @covers \Couscous\Module\Config\Step\OverrideConfigFromCLI
+ */
+class OverrideConfigFromCLITest extends \PHPUnit_Framework_TestCase
+{
+    /**
+     * @test
+     */
+    public function should_override_title_if_specified()
+    {
+        $project = new MockProject();
+        $project->metadata['title'] = 'foo';
+        $project->metadata['cliConfig'] = ['title=bar'];
+
+        $logger = $this->getMock("Psr\Log\LoggerInterface");
+
+        $step = new OverrideConfigFromCLI($logger);
+        $step->__invoke($project);
+
+        $this->assertEquals('bar', $project->metadata['title']);
+    }
+
+    /**
+     * @test
+     */
+    public function should_not_override_title_if_not_specified()
+    {
+        $project = new MockProject();
+        $project->metadata['title'] = 'foo';
+        $project->metadata['cliConfig'] = [];
+
+        $logger = $this->getMock("Psr\Log\LoggerInterface");
+
+        $step = new OverrideConfigFromCLI($logger);
+        $step->__invoke($project);
+
+        $this->assertEquals('foo', $project->metadata['title']);
+    }
+
+    /**
+     * @test
+     */
+    public function should_not_override_title_if_no_cliConfig()
+    {
+        $project = new MockProject();
+        $project->metadata['title'] = 'foo';
+
+        $logger = $this->getMock("Psr\Log\LoggerInterface");
+
+        $step = new OverrideConfigFromCLI($logger);
+        $step->__invoke($project);
+
+        $this->assertEquals('foo', $project->metadata['title']);
+    }
+}