diff --git a/composer.lock b/composer.lock
index 7c7176bc9746c0666ba25f396ffd3c8aa6a5eac6..0a0281a7f3bcbbc7ac6d4d61c09db23b4f439d78 100644
--- a/composer.lock
+++ b/composer.lock
@@ -437,7 +437,7 @@
         },
         {
             "name": "drupal/core",
-            "version": "10.0.x-dev",
+            "version": "10.0.0-alpha4",
             "dist": {
                 "type": "path",
                 "url": "core",
@@ -680,7 +680,7 @@
         },
         {
             "name": "drupal/core-project-message",
-            "version": "10.0.x-dev",
+            "version": "10.0.0-alpha4",
             "dist": {
                 "type": "path",
                 "url": "composer/Plugin/ProjectMessage",
@@ -713,7 +713,7 @@
         },
         {
             "name": "drupal/core-vendor-hardening",
-            "version": "10.0.x-dev",
+            "version": "10.0.0-alpha4",
             "dist": {
                 "type": "path",
                 "url": "composer/Plugin/VendorHardening",
@@ -8270,11 +8270,7 @@
     ],
     "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": [],
@@ -8282,5 +8278,5 @@
     "platform-overrides": {
         "php": "8.1.0"
     },
-    "plugin-api-version": "2.2.0"
+    "plugin-api-version": "2.3.0"
 }
diff --git a/composer/Metapackage/CoreRecommended/composer.json b/composer/Metapackage/CoreRecommended/composer.json
index 58c5c4344d97dbc94cc5437830764496d7df22f6..b83172fb060de20a2bd8f2975e203e45546066e3 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-alpha4",
         "asm89/stack-cors": "v2.1.1",
         "composer/semver": "3.3.2",
         "doctrine/annotations": "1.13.2",
diff --git a/composer/Metapackage/PinnedDevDependencies/composer.json b/composer/Metapackage/PinnedDevDependencies/composer.json
index 174e67473bfad822af6a9835fc93a35744d772e5..c07e74eef3cf474f520d844389760669874eb2f8 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-alpha4",
         "behat/mink": "v1.10.0",
         "behat/mink-browserkit-driver": "v2.1.0",
         "behat/mink-selenium2-driver": "v1.6.0",
diff --git a/composer/Template/LegacyProject/composer.json b/composer/Template/LegacyProject/composer.json
index c79a42d6ce207795fa69a9d03f4167608a3e5db1..8d6ceb796c061d61659735298c91e043ebb21748 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 9257e238b9b889c42da444f8a799219433183d19..199461e2a8741e1fe5c6cf5a0a166f3f154ad140 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 c0270ada4a7fa25f68e90d0835beb3948c31874d..43aed7304031b24553629ba09c813e96987f7de3 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-alpha4';
 
   /**
    * Core API compatibility.