diff --git a/composer.lock b/composer.lock
index 9222c57db88777bf70e0bc72a0f5e92233d2f940..0bd2a98203a33cf76bd9aa9f3e2144dd93bf2eae 100644
--- a/composer.lock
+++ b/composer.lock
@@ -439,7 +439,7 @@
         },
         {
             "name": "drupal/core",
-            "version": "10.0.0-rc3",
+            "version": "10.0.x-dev",
             "dist": {
                 "type": "path",
                 "url": "core",
@@ -594,7 +594,7 @@
         },
         {
             "name": "drupal/core-project-message",
-            "version": "10.0.0-rc3",
+            "version": "10.0.x-dev",
             "dist": {
                 "type": "path",
                 "url": "composer/Plugin/ProjectMessage",
@@ -627,7 +627,7 @@
         },
         {
             "name": "drupal/core-vendor-hardening",
-            "version": "10.0.0-rc3",
+            "version": "10.0.x-dev",
             "dist": {
                 "type": "path",
                 "url": "composer/Plugin/VendorHardening",
@@ -8378,7 +8378,11 @@
     ],
     "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": [],
diff --git a/composer/Metapackage/CoreRecommended/composer.json b/composer/Metapackage/CoreRecommended/composer.json
index de2d0c361d3608ff033d9be2fcb077b9ad14dded..1d546f91a5f6c362347f8914c050944fca098168 100644
--- a/composer/Metapackage/CoreRecommended/composer.json
+++ b/composer/Metapackage/CoreRecommended/composer.json
@@ -7,7 +7,7 @@
         "webflo/drupal-core-strict": "*"
     },
     "require": {
-        "drupal/core": "10.0.0-rc3",
+        "drupal/core": "10.0.x-dev",
         "asm89/stack-cors": "~v2.1.1",
         "composer/semver": "~3.3.2",
         "doctrine/annotations": "~1.13.3",
diff --git a/composer/Metapackage/PinnedDevDependencies/composer.json b/composer/Metapackage/PinnedDevDependencies/composer.json
index 98bebec98b964dd2ac3af9c876228f87854a256a..bd41c20bffb7182d27bcb432988ff042b19c03b7 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": "10.0.0-rc3",
+        "drupal/core": "10.0.x-dev",
         "behat/mink": "v1.10.0",
         "behat/mink-browserkit-driver": "v2.1.0",
         "behat/mink-selenium2-driver": "v1.6.0",
diff --git a/core/lib/Drupal.php b/core/lib/Drupal.php
index 0720054035afbe62190fc917ee6bb9eb3637ea71..4fc2485bfe0abfce24bae9fee220f6843ab29774 100644
--- a/core/lib/Drupal.php
+++ b/core/lib/Drupal.php
@@ -75,7 +75,7 @@ class Drupal {
   /**
    * The current system version.
    */
-  const VERSION = '10.0.0-rc3';
+  const VERSION = '10.0.0-dev';
 
   /**
    * Core API compatibility.
diff --git a/core/lib/Drupal/Component/Annotation/composer.json b/core/lib/Drupal/Component/Annotation/composer.json
index 36f95bfe056adbf027be5caa991ba11d238e5925..8aa65ec8d871e273861102a741e8f7e5bdf0895c 100644
--- a/core/lib/Drupal/Component/Annotation/composer.json
+++ b/core/lib/Drupal/Component/Annotation/composer.json
@@ -9,9 +9,9 @@
     "require": {
         "php": ">=8.1.0",
         "doctrine/annotations": "^1.13",
-        "drupal/core-file-cache": "10.0.0-rc3",
-        "drupal/core-plugin": "10.0.0-rc3",
-        "drupal/core-utility": "10.0.0-rc3"
+        "drupal/core-file-cache": "10.0.x-dev",
+        "drupal/core-plugin": "10.0.x-dev",
+        "drupal/core-utility": "10.0.x-dev"
     },
     "autoload": {
         "psr-4": {
@@ -23,5 +23,5 @@
             "This file was partially generated automatically. See: https://www.drupal.org/node/3293830"
         ]
     },
-    "minimum-stability": "RC"
+    "minimum-stability": "dev"
 }
diff --git a/core/lib/Drupal/Component/Datetime/composer.json b/core/lib/Drupal/Component/Datetime/composer.json
index f9ee40839d14ce6df69a0b177b51cd115100a88c..9a254e30f02ee1b95bfec4dee798e02c7a1f707a 100644
--- a/core/lib/Drupal/Component/Datetime/composer.json
+++ b/core/lib/Drupal/Component/Datetime/composer.json
@@ -8,7 +8,7 @@
     "license": "GPL-2.0-or-later",
     "require": {
         "php": ">=8.1.0",
-        "drupal/core-utility": "10.0.0-rc3"
+        "drupal/core-utility": "10.0.x-dev"
     },
     "autoload": {
         "psr-4": {
@@ -20,5 +20,5 @@
             "This file was partially generated automatically. See: https://www.drupal.org/node/3293830"
         ]
     },
-    "minimum-stability": "RC"
+    "minimum-stability": "dev"
 }
diff --git a/core/lib/Drupal/Component/Discovery/composer.json b/core/lib/Drupal/Component/Discovery/composer.json
index 0ce0856b46cbb066fecb5800cf4f6a735c01d390..887db29b2807b79953c75c16d07a194da79d048c 100644
--- a/core/lib/Drupal/Component/Discovery/composer.json
+++ b/core/lib/Drupal/Component/Discovery/composer.json
@@ -8,8 +8,8 @@
     "license": "GPL-2.0-or-later",
     "require": {
         "php": ">=8.1.0",
-        "drupal/core-file-cache": "10.0.0-rc3",
-        "drupal/core-serialization": "10.0.0-rc3"
+        "drupal/core-file-cache": "10.0.x-dev",
+        "drupal/core-serialization": "10.0.x-dev"
     },
     "autoload": {
         "psr-4": {
@@ -21,5 +21,5 @@
             "This file was partially generated automatically. See: https://www.drupal.org/node/3293830"
         ]
     },
-    "minimum-stability": "RC"
+    "minimum-stability": "dev"
 }
diff --git a/core/lib/Drupal/Component/FrontMatter/composer.json b/core/lib/Drupal/Component/FrontMatter/composer.json
index a01fe6e010f815c8bb077a1869889c5bb126a5a2..cca1234c73ccb5664bf5abdfc76e23bba8613574 100644
--- a/core/lib/Drupal/Component/FrontMatter/composer.json
+++ b/core/lib/Drupal/Component/FrontMatter/composer.json
@@ -8,7 +8,7 @@
     "license": "GPL-2.0-or-later",
     "require": {
         "php": ">=8.1.0",
-        "drupal/core-serialization": "10.0.0-rc3"
+        "drupal/core-serialization": "10.0.x-dev"
     },
     "autoload": {
         "psr-4": {
@@ -20,5 +20,5 @@
             "This file was partially generated automatically. See: https://www.drupal.org/node/3293830"
         ]
     },
-    "minimum-stability": "RC"
+    "minimum-stability": "dev"
 }
diff --git a/core/lib/Drupal/Component/Gettext/composer.json b/core/lib/Drupal/Component/Gettext/composer.json
index af43566749da8ad21c98b4fbef09737f28249e49..0651e10c63d7640935469e9e058b9f6ef04cbf62 100644
--- a/core/lib/Drupal/Component/Gettext/composer.json
+++ b/core/lib/Drupal/Component/Gettext/composer.json
@@ -9,7 +9,7 @@
     },
     "require": {
         "php": ">=8.1.0",
-        "drupal/core-render": "10.0.0-rc3"
+        "drupal/core-render": "10.0.x-dev"
     },
     "autoload": {
         "psr-4": {
@@ -21,5 +21,5 @@
             "This file was partially generated automatically. See: https://www.drupal.org/node/3293830"
         ]
     },
-    "minimum-stability": "RC"
+    "minimum-stability": "dev"
 }
diff --git a/core/lib/Drupal/Component/PhpStorage/composer.json b/core/lib/Drupal/Component/PhpStorage/composer.json
index 0547df8e73fe91866fdad54165af3fb94b8dd32d..2085d3cfbfafba22714011321e62b32160fd4d0b 100644
--- a/core/lib/Drupal/Component/PhpStorage/composer.json
+++ b/core/lib/Drupal/Component/PhpStorage/composer.json
@@ -8,7 +8,7 @@
     "license": "GPL-2.0-or-later",
     "require": {
         "php": ">=8.1.0",
-        "drupal/core-file-security": "10.0.0-rc3"
+        "drupal/core-file-security": "10.0.x-dev"
     },
     "autoload": {
         "psr-4": {
@@ -20,5 +20,5 @@
             "This file was partially generated automatically. See: https://www.drupal.org/node/3293830"
         ]
     },
-    "minimum-stability": "RC"
+    "minimum-stability": "dev"
 }
diff --git a/core/lib/Drupal/Component/Render/composer.json b/core/lib/Drupal/Component/Render/composer.json
index 11e5aa21576ad16413abd72bae90b38733f9b047..1875b9367ab73d9e4b50fdb2ec7cc7411c6bfa79 100644
--- a/core/lib/Drupal/Component/Render/composer.json
+++ b/core/lib/Drupal/Component/Render/composer.json
@@ -8,7 +8,7 @@
     "license": "GPL-2.0-or-later",
     "require": {
         "php": ">=8.1.0",
-        "drupal/core-utility": "10.0.0-rc3"
+        "drupal/core-utility": "10.0.x-dev"
     },
     "autoload": {
         "psr-4": {
@@ -20,5 +20,5 @@
             "This file was partially generated automatically. See: https://www.drupal.org/node/3293830"
         ]
     },
-    "minimum-stability": "RC"
+    "minimum-stability": "dev"
 }