diff --git a/doc/changelog.rst b/doc/changelog.rst
index 5f2f928a324ac72fc91aa31d4578ea65f78bb58f..665757b69bedfe98d3d2265878691552aa5f1ef0 100644
--- a/doc/changelog.rst
+++ b/doc/changelog.rst
@@ -1,7 +1,7 @@
 Changelog
 =========
 
-2.2.1 (2017-XX-XX)
+2.2.1 (2017-12-14)
 ------------------
 
 * added support for Swiftmailer SSL stream_context_options option
diff --git a/src/Silex/Application.php b/src/Silex/Application.php
index 1eb0ef375c404d32eeb562ef270ef21ded72b53c..b930270445daff48c452957381565de192161ec3 100644
--- a/src/Silex/Application.php
+++ b/src/Silex/Application.php
@@ -41,7 +41,7 @@ use Silex\Provider\HttpKernelServiceProvider;
  */
 class Application extends Container implements HttpKernelInterface, TerminableInterface
 {
-    const VERSION = '2.2.1-DEV';
+    const VERSION = '2.2.1';
 
     const EARLY_EVENT = 512;
     const LATE_EVENT = -512;