diff --git a/composer.lock b/composer.lock
index 4a34dcf8f87d1984864be88eb5acf1b7d834f7e9..f15f74aef3369b92531b4a1b77aaceb46f314c08 100644
--- a/composer.lock
+++ b/composer.lock
@@ -491,7 +491,7 @@
         },
         {
             "name": "drupal/core",
-            "version": "10.3.x-dev",
+            "version": "10.3.0",
             "dist": {
                 "type": "path",
                 "url": "core",
@@ -652,7 +652,7 @@
         },
         {
             "name": "drupal/core-project-message",
-            "version": "10.3.x-dev",
+            "version": "10.3.0",
             "dist": {
                 "type": "path",
                 "url": "composer/Plugin/ProjectMessage",
@@ -685,7 +685,7 @@
         },
         {
             "name": "drupal/core-vendor-hardening",
-            "version": "10.3.x-dev",
+            "version": "10.3.0",
             "dist": {
                 "type": "path",
                 "url": "composer/Plugin/VendorHardening",
@@ -9610,11 +9610,7 @@
     ],
     "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 c589f336bcedcf03550fd3db0e0038af804a0889..ff36c65a9c138d06382c146ea69c58d0d6c36b4c 100644
--- a/composer/Metapackage/CoreRecommended/composer.json
+++ b/composer/Metapackage/CoreRecommended/composer.json
@@ -7,7 +7,7 @@
         "webflo/drupal-core-strict": "*"
     },
     "require": {
-        "drupal/core": "10.3.x-dev",
+        "drupal/core": "10.3.0",
         "asm89/stack-cors": "~v2.2.0",
         "composer/semver": "~3.4.0",
         "doctrine/annotations": "~1.14.3",
diff --git a/composer/Metapackage/PinnedDevDependencies/composer.json b/composer/Metapackage/PinnedDevDependencies/composer.json
index cfdcd34e273bc116b5fb6a6b4272e75874851fdf..293d59436b62cc828fd90494447bc10c03f42767 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": "10.3.x-dev",
+        "drupal/core": "10.3.0",
         "behat/mink": "v1.11.0",
         "behat/mink-browserkit-driver": "v2.2.0",
         "colinodell/psr-testlogger": "v1.3.0",
diff --git a/composer/Template/LegacyProject/composer.json b/composer/Template/LegacyProject/composer.json
index da3bb1a0cb1540013457f5d98ef903dc4c433a85..fbd3bff2e0f6507afb9166079ec3ca677b213f28 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": "stable",
     "prefer-stable": true,
     "config": {
         "allow-plugins": {
diff --git a/composer/Template/RecommendedProject/composer.json b/composer/Template/RecommendedProject/composer.json
index 4814912141eb755b79d7e734a7785582320d1126..d4908c029feb52d02be636e04bb6d90a6e7a5f86 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": "stable",
     "prefer-stable": true,
     "config": {
         "allow-plugins": {
diff --git a/core/lib/Drupal.php b/core/lib/Drupal.php
index 4ca937b6c68d30d0fe03d04c316b35c07a890302..18a6d58dff8f2ff6df67316b703e1471aab96574 100644
--- a/core/lib/Drupal.php
+++ b/core/lib/Drupal.php
@@ -75,7 +75,7 @@ class Drupal {
   /**
    * The current system version.
    */
-  const VERSION = '10.3.0-dev';
+  const VERSION = '10.3.0';
 
   /**
    * Core API compatibility.
diff --git a/core/lib/Drupal/Component/Annotation/composer.json b/core/lib/Drupal/Component/Annotation/composer.json
index 218e7b2fa8ea9c9762cf8ac0386617e9216fceb2..260122fb3fc468ffe5a27bdb72ba79c7cc684ba9 100644
--- a/core/lib/Drupal/Component/Annotation/composer.json
+++ b/core/lib/Drupal/Component/Annotation/composer.json
@@ -9,10 +9,10 @@
     "require": {
         "php": ">=8.1.0",
         "doctrine/annotations": "^1.14",
-        "drupal/core-class-finder": "10.3.x-dev",
-        "drupal/core-file-cache": "10.3.x-dev",
-        "drupal/core-plugin": "10.3.x-dev",
-        "drupal/core-utility": "10.3.x-dev"
+        "drupal/core-class-finder": "^10.3",
+        "drupal/core-file-cache": "^10.3",
+        "drupal/core-plugin": "^10.3",
+        "drupal/core-utility": "^10.3"
     },
     "autoload": {
         "psr-4": {
diff --git a/core/lib/Drupal/Component/Datetime/composer.json b/core/lib/Drupal/Component/Datetime/composer.json
index c2391fb45a97bc00a5bc4ae6cb389eebf2013935..1273120f6531ca80a249e280d9dd4cd0e3ab0d2b 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": "10.3.x-dev"
+        "drupal/core-utility": "^10.3"
     },
     "autoload": {
         "psr-4": {
diff --git a/core/lib/Drupal/Component/Discovery/composer.json b/core/lib/Drupal/Component/Discovery/composer.json
index 758aef63450afb6a677f0501bda3dcb546d62da9..490ca5d9a2dfaf92dbe56635f79513b2e4a14b29 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": "10.3.x-dev",
-        "drupal/core-serialization": "10.3.x-dev"
+        "drupal/core-file-cache": "^10.3",
+        "drupal/core-serialization": "^10.3"
     },
     "autoload": {
         "psr-4": {
diff --git a/core/lib/Drupal/Component/FrontMatter/composer.json b/core/lib/Drupal/Component/FrontMatter/composer.json
index 5ff2dc304eb4d3615275ecbb3a815e3e5b5fc5a5..6e1f333fb09607ab5f327214c2a4a046c92cbcc9 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": "10.3.x-dev"
+        "drupal/core-serialization": "^10.3"
     },
     "autoload": {
         "psr-4": {
diff --git a/core/lib/Drupal/Component/Gettext/composer.json b/core/lib/Drupal/Component/Gettext/composer.json
index 61f297022976e690567909f0fa1a68b5651404e3..4df1419f56a0d5bd7e72c4c4f6c48e25c6ed169b 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": "10.3.x-dev"
+        "drupal/core-render": "^10.3"
     },
     "autoload": {
         "psr-4": {
diff --git a/core/lib/Drupal/Component/PhpStorage/composer.json b/core/lib/Drupal/Component/PhpStorage/composer.json
index be4099a3367f876b79d38a1fc09f773f0b7995d2..43a132ec1e3759262e96ba76d9f17d53a9a2dbe7 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": "10.3.x-dev"
+        "drupal/core-file-security": "^10.3"
     },
     "autoload": {
         "psr-4": {
diff --git a/core/lib/Drupal/Component/Render/composer.json b/core/lib/Drupal/Component/Render/composer.json
index 5b2d7738f0c30848e81f0f29d5bbc68b43c513b9..641025399ccb289fcac1ee2255ce5cc59002dd1a 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": "10.3.x-dev"
+        "drupal/core-utility": "^10.3"
     },
     "autoload": {
         "psr-4": {