diff --git a/composer.lock b/composer.lock
index f0b78a2fcb19670bbc3471d48da2c1b24549f696..5b6c87598bf5736cf4128055eda60c5cc3f65643 100644
--- a/composer.lock
+++ b/composer.lock
@@ -481,7 +481,7 @@
         },
         {
             "name": "drupal/core",
-            "version": "9.0.7",
+            "version": "9.0.x-dev",
             "dist": {
                 "type": "path",
                 "url": "core",
@@ -728,7 +728,7 @@
         },
         {
             "name": "drupal/core-project-message",
-            "version": "9.0.7",
+            "version": "9.0.x-dev",
             "dist": {
                 "type": "path",
                 "url": "composer/Plugin/ProjectMessage",
@@ -761,7 +761,7 @@
         },
         {
             "name": "drupal/core-vendor-hardening",
-            "version": "9.0.7",
+            "version": "9.0.x-dev",
             "dist": {
                 "type": "path",
                 "url": "composer/Plugin/VendorHardening",
@@ -7100,10 +7100,14 @@
     ],
     "aliases": [],
     "minimum-stability": "dev",
-    "stability-flags": [],
+    "stability-flags": {
+        "drupal/core": 20,
+        "drupal/core-project-message": 20,
+        "drupal/core-vendor-hardening": 20
+    },
     "prefer-stable": true,
     "prefer-lowest": false,
     "platform": [],
     "platform-dev": [],
-    "plugin-api-version": "2.0.0"
+    "plugin-api-version": "1.1.0"
 }
diff --git a/composer/Metapackage/CoreRecommended/composer.json b/composer/Metapackage/CoreRecommended/composer.json
index bfad52acf4ee3c6de2a159502d230869efe864e7..b1c94c88afe4caa0c059911011307e623f21ef57 100644
--- a/composer/Metapackage/CoreRecommended/composer.json
+++ b/composer/Metapackage/CoreRecommended/composer.json
@@ -7,7 +7,7 @@
         "webflo/drupal-core-strict": "*"
     },
     "require": {
-        "drupal/core": "9.0.7",
+        "drupal/core": "9.0.x-dev",
         "asm89/stack-cors": "1.3.0",
         "composer/semver": "1.5.1",
         "doctrine/annotations": "1.10.3",
diff --git a/composer/Metapackage/PinnedDevDependencies/composer.json b/composer/Metapackage/PinnedDevDependencies/composer.json
index c3308a5ba0968325fa53dfa89750a7e33d542405..0c80dcac811825f647c9bc2c7cce8580f5c870e1 100644
--- a/composer/Metapackage/PinnedDevDependencies/composer.json
+++ b/composer/Metapackage/PinnedDevDependencies/composer.json
@@ -7,7 +7,7 @@
         "webflo/drupal-core-require-dev": "*"
     },
     "require": {
-        "drupal/core": "9.0.7",
+        "drupal/core": "9.0.x-dev",
         "behat/mink": "v1.8.1",
         "behat/mink-browserkit-driver": "v1.3.4",
         "behat/mink-goutte-driver": "v1.2.1",
diff --git a/core/lib/Drupal.php b/core/lib/Drupal.php
index 79851ece1414d53ce0b746bd4e1d545770ef6105..a756dee4924a3c7729ec563535983ed97bc6a8fc 100644
--- a/core/lib/Drupal.php
+++ b/core/lib/Drupal.php
@@ -80,7 +80,7 @@ class Drupal {
   /**
    * The current system version.
    */
-  const VERSION = '9.0.7';
+  const VERSION = '9.0.8-dev';
 
   /**
    * Core API compatibility.