diff --git a/composer.lock b/composer.lock
index 08c663658415c589329255acf054d7289be8e295..f1c2f18c5f531755c966aef1cbc5e87727c56985 100644
--- a/composer.lock
+++ b/composer.lock
@@ -436,7 +436,7 @@
         },
         {
             "name": "drupal/core",
-            "version": "10.0.0-alpha3",
+            "version": "10.0.x-dev",
             "dist": {
                 "type": "path",
                 "url": "core",
@@ -679,7 +679,7 @@
         },
         {
             "name": "drupal/core-project-message",
-            "version": "10.0.0-alpha3",
+            "version": "10.0.x-dev",
             "dist": {
                 "type": "path",
                 "url": "composer/Plugin/ProjectMessage",
@@ -712,7 +712,7 @@
         },
         {
             "name": "drupal/core-vendor-hardening",
-            "version": "10.0.0-alpha3",
+            "version": "10.0.x-dev",
             "dist": {
                 "type": "path",
                 "url": "composer/Plugin/VendorHardening",
@@ -8260,7 +8260,11 @@
     ],
     "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 7843c7d8b2f7c32a6b5e034d1a427ac00e70a28e..77eb4b23acf80dd32fa865bf24dbff748e15c169 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-alpha3",
+        "drupal/core": "10.0.x-dev",
         "asm89/stack-cors": "v2.1.1",
         "composer/semver": "3.3.1",
         "doctrine/annotations": "1.13.2",
diff --git a/composer/Metapackage/PinnedDevDependencies/composer.json b/composer/Metapackage/PinnedDevDependencies/composer.json
index c702f2834f5d4c215db20aa5c4585086c91e5c34..85d9abe5c6aa5ec61352811dac8cd03df170efe0 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-alpha3",
+        "drupal/core": "10.0.x-dev",
         "behat/mink": "v1.10.0",
         "behat/mink-browserkit-driver": "v2.1.0",
         "behat/mink-selenium2-driver": "v1.5.0",
diff --git a/composer/Template/LegacyProject/composer.json b/composer/Template/LegacyProject/composer.json
index 8d6ceb796c061d61659735298c91e043ebb21748..c79a42d6ce207795fa69a9d03f4167608a3e5db1 100644
--- a/composer/Template/LegacyProject/composer.json
+++ b/composer/Template/LegacyProject/composer.json
@@ -27,7 +27,7 @@
     "conflict": {
         "drupal/drupal": "*"
     },
-    "minimum-stability": "alpha",
+    "minimum-stability": "dev",
     "prefer-stable": true,
     "config": {
         "sort-packages": true
diff --git a/composer/Template/RecommendedProject/composer.json b/composer/Template/RecommendedProject/composer.json
index 199461e2a8741e1fe5c6cf5a0a166f3f154ad140..9257e238b9b889c42da444f8a799219433183d19 100644
--- a/composer/Template/RecommendedProject/composer.json
+++ b/composer/Template/RecommendedProject/composer.json
@@ -26,7 +26,7 @@
     "conflict": {
         "drupal/drupal": "*"
     },
-    "minimum-stability": "alpha",
+    "minimum-stability": "dev",
     "prefer-stable": true,
     "config": {
         "sort-packages": true
diff --git a/core/lib/Drupal.php b/core/lib/Drupal.php
index 4c307f8118034ea6a7fddf998100ee3c8d6b32d0..c0270ada4a7fa25f68e90d0835beb3948c31874d 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-alpha3';
+  const VERSION = '10.0.0-dev';
 
   /**
    * Core API compatibility.