diff --git a/apps/advanced/composer.json b/apps/advanced/composer.json
index 453b8c6..14487e3 100644
--- a/apps/advanced/composer.json
+++ b/apps/advanced/composer.json
@@ -12,7 +12,7 @@
         "irc": "irc://irc.freenode.net/yii",
         "source": "https://github.com/yiisoft/yii2"
     },
-    "minimum-stability": "RC",
+    "minimum-stability": "dev",
     "require": {
         "php": ">=5.4.0",
         "yiisoft/yii2": "*",
diff --git a/apps/basic/composer.json b/apps/basic/composer.json
index e56ed64..56756ec 100644
--- a/apps/basic/composer.json
+++ b/apps/basic/composer.json
@@ -12,7 +12,7 @@
         "irc": "irc://irc.freenode.net/yii",
         "source": "https://github.com/yiisoft/yii2"
     },
-    "minimum-stability": "RC",
+    "minimum-stability": "dev",
     "require": {
         "php": ">=5.4.0",
         "yiisoft/yii2": "*",
diff --git a/apps/benchmark/composer.json b/apps/benchmark/composer.json
index 92d97ca..c8ed589 100644
--- a/apps/benchmark/composer.json
+++ b/apps/benchmark/composer.json
@@ -15,7 +15,7 @@
 	"config": {
 	  "vendor-dir": "protected/vendor"
 	},
-	"minimum-stability": "RC",
+	"minimum-stability": "dev",
 	"require": {
 		"php": ">=5.4.0",
 		"yiisoft/yii2": "*"
diff --git a/extensions/apidoc/CHANGELOG.md b/extensions/apidoc/CHANGELOG.md
index 6b81be6..25c9a78 100644
--- a/extensions/apidoc/CHANGELOG.md
+++ b/extensions/apidoc/CHANGELOG.md
@@ -1,6 +1,12 @@
 Yii Framework 2 apidoc extension Change Log
 ===========================================
 
+2.0.0 under development
+-----------------------
+
+- no changes in this release.
+
+
 2.0.0-rc September 27, 2014
 ---------------------------
 
diff --git a/extensions/authclient/CHANGELOG.md b/extensions/authclient/CHANGELOG.md
index e5b4528..0025be7 100644
--- a/extensions/authclient/CHANGELOG.md
+++ b/extensions/authclient/CHANGELOG.md
@@ -1,6 +1,12 @@
 Yii Framework 2 authclient extension Change Log
 ===============================================
 
+2.0.0 under development
+-----------------------
+
+- no changes in this release.
+
+
 2.0.0-rc September 27, 2014
 ---------------------------
 
diff --git a/extensions/bootstrap/CHANGELOG.md b/extensions/bootstrap/CHANGELOG.md
index 0828758..0742dd9 100644
--- a/extensions/bootstrap/CHANGELOG.md
+++ b/extensions/bootstrap/CHANGELOG.md
@@ -1,6 +1,12 @@
 Yii Framework 2 bootstrap extension Change Log
 ==============================================
 
+2.0.0 under development
+-----------------------
+
+- no changes in this release.
+
+
 2.0.0-rc September 27, 2014
 ---------------------------
 
diff --git a/extensions/codeception/CHANGELOG.md b/extensions/codeception/CHANGELOG.md
index caac140..6952760 100644
--- a/extensions/codeception/CHANGELOG.md
+++ b/extensions/codeception/CHANGELOG.md
@@ -1,6 +1,12 @@
 Yii Framework 2 Codeception extension Change Log
 ================================================
 
+2.0.0 under development
+-----------------------
+
+- no changes in this release.
+
+
 2.0.0-rc September 27, 2014
 ---------------------------
 
diff --git a/extensions/composer/CHANGELOG.md b/extensions/composer/CHANGELOG.md
index 955da3f..11577cd 100644
--- a/extensions/composer/CHANGELOG.md
+++ b/extensions/composer/CHANGELOG.md
@@ -1,6 +1,12 @@
 Yii Framework 2 composer extension Change Log
 =============================================
 
+2.0.0 under development
+-----------------------
+
+- no changes in this release.
+
+
 2.0.0-rc September 27, 2014
 ---------------------------
 
diff --git a/extensions/debug/CHANGELOG.md b/extensions/debug/CHANGELOG.md
index 1a3212f..08660c6 100644
--- a/extensions/debug/CHANGELOG.md
+++ b/extensions/debug/CHANGELOG.md
@@ -1,6 +1,12 @@
 Yii Framework 2 debug extension Change Log
 ==========================================
 
+2.0.0 under development
+-----------------------
+
+- no changes in this release.
+
+
 2.0.0-rc September 27, 2014
 ---------------------------
 
diff --git a/extensions/elasticsearch/CHANGELOG.md b/extensions/elasticsearch/CHANGELOG.md
index 749fd70..f07897c 100644
--- a/extensions/elasticsearch/CHANGELOG.md
+++ b/extensions/elasticsearch/CHANGELOG.md
@@ -1,6 +1,12 @@
 Yii Framework 2 elasticsearch extension Change Log
 ==================================================
 
+2.0.0 under development
+-----------------------
+
+- no changes in this release.
+
+
 2.0.0-rc September 27, 2014
 ---------------------------
 
diff --git a/extensions/faker/CHANGELOG.md b/extensions/faker/CHANGELOG.md
index 2287401..8063829 100644
--- a/extensions/faker/CHANGELOG.md
+++ b/extensions/faker/CHANGELOG.md
@@ -1,6 +1,12 @@
 Yii Framework 2 faker extension Change Log
 ==============================================
 
+2.0.0 under development
+-----------------------
+
+- no changes in this release.
+
+
 2.0.0-rc September 27, 2014
 ---------------------------
 
diff --git a/extensions/gii/CHANGELOG.md b/extensions/gii/CHANGELOG.md
index 89ae430..f5f57a8 100644
--- a/extensions/gii/CHANGELOG.md
+++ b/extensions/gii/CHANGELOG.md
@@ -1,6 +1,12 @@
 Yii Framework 2 gii extension Change Log
 ========================================
 
+2.0.0 under development
+-----------------------
+
+- no changes in this release.
+
+
 2.0.0-rc September 27, 2014
 ---------------------------
 
diff --git a/extensions/imagine/CHANGELOG.md b/extensions/imagine/CHANGELOG.md
index f01478f..dd4e57a 100644
--- a/extensions/imagine/CHANGELOG.md
+++ b/extensions/imagine/CHANGELOG.md
@@ -1,6 +1,12 @@
 Yii Framework 2 imagine extension Change Log
 ================================================
 
+2.0.0 under development
+-----------------------
+
+- no changes in this release.
+
+
 2.0.0-rc September 27, 2014
 ---------------------------
 
diff --git a/extensions/jui/CHANGELOG.md b/extensions/jui/CHANGELOG.md
index 48f5602..7cb3c95 100644
--- a/extensions/jui/CHANGELOG.md
+++ b/extensions/jui/CHANGELOG.md
@@ -1,6 +1,12 @@
 Yii Framework 2 jui extension Change Log
 ========================================
 
+2.0.0 under development
+-----------------------
+
+- no changes in this release.
+
+
 2.0.0-rc September 27, 2014
 ---------------------------
 
diff --git a/extensions/mongodb/CHANGELOG.md b/extensions/mongodb/CHANGELOG.md
index c556996..b54f53d 100644
--- a/extensions/mongodb/CHANGELOG.md
+++ b/extensions/mongodb/CHANGELOG.md
@@ -1,6 +1,12 @@
 Yii Framework 2 mongodb extension Change Log
 ============================================
 
+2.0.0 under development
+-----------------------
+
+- no changes in this release.
+
+
 2.0.0-rc September 27, 2014
 ---------------------------
 
diff --git a/extensions/redis/CHANGELOG.md b/extensions/redis/CHANGELOG.md
index faf6045..0a40e56 100644
--- a/extensions/redis/CHANGELOG.md
+++ b/extensions/redis/CHANGELOG.md
@@ -1,6 +1,12 @@
 Yii Framework 2 redis extension Change Log
 ==========================================
 
+2.0.0 under development
+-----------------------
+
+- no changes in this release.
+
+
 2.0.0-rc September 27, 2014
 ---------------------------
 
diff --git a/extensions/smarty/CHANGELOG.md b/extensions/smarty/CHANGELOG.md
index c0afb41..42e8898 100644
--- a/extensions/smarty/CHANGELOG.md
+++ b/extensions/smarty/CHANGELOG.md
@@ -1,6 +1,12 @@
 Yii Framework 2 smarty extension Change Log
 ===========================================
 
+2.0.0 under development
+-----------------------
+
+- no changes in this release.
+
+
 2.0.0-rc September 27, 2014
 ---------------------------
 
diff --git a/extensions/sphinx/CHANGELOG.md b/extensions/sphinx/CHANGELOG.md
index 9eb1e7d..9f19298 100644
--- a/extensions/sphinx/CHANGELOG.md
+++ b/extensions/sphinx/CHANGELOG.md
@@ -1,6 +1,12 @@
 Yii Framework 2 sphinx extension Change Log
 ===========================================
 
+2.0.0 under development
+-----------------------
+
+- no changes in this release.
+
+
 2.0.0-rc September 27, 2014
 ---------------------------
 
diff --git a/extensions/swiftmailer/CHANGELOG.md b/extensions/swiftmailer/CHANGELOG.md
index 70543d0..07501d9 100644
--- a/extensions/swiftmailer/CHANGELOG.md
+++ b/extensions/swiftmailer/CHANGELOG.md
@@ -1,6 +1,12 @@
 Yii Framework 2 swiftmailer extension Change Log
 ================================================
 
+2.0.0 under development
+-----------------------
+
+- no changes in this release.
+
+
 2.0.0-rc September 27, 2014
 ---------------------------
 
diff --git a/extensions/twig/CHANGELOG.md b/extensions/twig/CHANGELOG.md
index 1353525..46a7a87 100644
--- a/extensions/twig/CHANGELOG.md
+++ b/extensions/twig/CHANGELOG.md
@@ -1,6 +1,12 @@
 Yii Framework 2 twig extension Change Log
 =========================================
 
+2.0.0 under development
+-----------------------
+
+- no changes in this release.
+
+
 2.0.0-rc September 27, 2014
 ---------------------------
 
diff --git a/framework/BaseYii.php b/framework/BaseYii.php
index adfb969..27acded 100644
--- a/framework/BaseYii.php
+++ b/framework/BaseYii.php
@@ -93,7 +93,7 @@ class BaseYii
      */
     public static function getVersion()
     {
-        return '2.0.0-rc';
+        return '2.0.0-dev';
     }
 
     /**
diff --git a/framework/CHANGELOG.md b/framework/CHANGELOG.md
index 5ca4a8b..3c5e8b8 100644
--- a/framework/CHANGELOG.md
+++ b/framework/CHANGELOG.md
@@ -1,6 +1,12 @@
 Yii Framework 2 Change Log
 ==========================
 
+2.0.0 under development
+-----------------------
+
+- no changes in this release.
+
+
 2.0.0-rc September 27, 2014
 ---------------------------