diff --git a/composer.lock b/composer.lock
index faa9be7fa8bb179920489cf3fe12706f8296f04c..18401900873f26329fd2d4ac26db0b3c2af65706 100644
--- a/composer.lock
+++ b/composer.lock
@@ -444,7 +444,7 @@
         },
         {
             "name": "drupal/core",
-            "version": "10.0.x-dev",
+            "version": "10.0.0-alpha2",
             "dist": {
                 "type": "path",
                 "url": "core",
@@ -688,7 +688,7 @@
         },
         {
             "name": "drupal/core-project-message",
-            "version": "10.0.x-dev",
+            "version": "10.0.0-alpha2",
             "dist": {
                 "type": "path",
                 "url": "composer/Plugin/ProjectMessage",
@@ -721,7 +721,7 @@
         },
         {
             "name": "drupal/core-vendor-hardening",
-            "version": "10.0.x-dev",
+            "version": "10.0.0-alpha2",
             "dist": {
                 "type": "path",
                 "url": "composer/Plugin/VendorHardening",
@@ -8463,11 +8463,7 @@
     ],
     "aliases": [],
     "minimum-stability": "dev",
-    "stability-flags": {
-        "drupal/core": 20,
-        "drupal/core-project-message": 20,
-        "drupal/core-vendor-hardening": 20
-    },
+    "stability-flags": [],
     "prefer-stable": true,
     "prefer-lowest": false,
     "platform": [],
diff --git a/composer/Metapackage/CoreRecommended/composer.json b/composer/Metapackage/CoreRecommended/composer.json
index 3bd5416ce92f253bb41ac08f121f03609027345d..4324f16bd0868ff718d1a06d31521e6977e7aec1 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.x-dev",
+        "drupal/core": "10.0.0-alpha2",
         "asm89/stack-cors": "v2.1.1",
         "composer/semver": "3.2.9",
         "doctrine/annotations": "1.13.2",
diff --git a/composer/Metapackage/PinnedDevDependencies/composer.json b/composer/Metapackage/PinnedDevDependencies/composer.json
index f01872320a6753438a5fa9908eda1711c22ca946..f6c7dfd6bd1a4da2907a5ffd81bb4d2a814fbff1 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.x-dev",
+        "drupal/core": "10.0.0-alpha2",
         "behat/mink-selenium2-driver": "v1.5.0",
         "composer/ca-bundle": "1.3.1",
         "composer/composer": "2.2.6",
diff --git a/composer/Template/LegacyProject/composer.json b/composer/Template/LegacyProject/composer.json
index 1eace67108a6ee0f20f8bfd528f5a8a3437eefd2..c8a1ed54edba94937dba9380844f952c96e523a5 100644
--- a/composer/Template/LegacyProject/composer.json
+++ b/composer/Template/LegacyProject/composer.json
@@ -27,7 +27,7 @@
     "conflict": {
         "drupal/drupal": "*"
     },
-    "minimum-stability": "dev",
+    "minimum-stability": "alpha",
     "prefer-stable": true,
     "config": {
         "sort-packages": true
diff --git a/composer/Template/RecommendedProject/composer.json b/composer/Template/RecommendedProject/composer.json
index 16b2c11288a70c00886ec54a8e6a710a62fc7144..c3e5940d47fd15344dc50d50f7cb367284ba5f29 100644
--- a/composer/Template/RecommendedProject/composer.json
+++ b/composer/Template/RecommendedProject/composer.json
@@ -26,7 +26,7 @@
     "conflict": {
         "drupal/drupal": "*"
     },
-    "minimum-stability": "dev",
+    "minimum-stability": "alpha",
     "prefer-stable": true,
     "config": {
         "sort-packages": true
diff --git a/core/lib/Drupal.php b/core/lib/Drupal.php
index f654f2ec3edcca2995073652ae2f5fe62ad079dd..184c894dc485e5459901f8a007366472bb9ad724 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-dev';
+  const VERSION = '10.0.0-alpha2';
 
   /**
    * Core API compatibility.