diff --git a/composer.lock b/composer.lock
index 144cb06fa6162a4ee577aefca036e4311b640273..2b77e12904930a7ea651e4448023024c4c8a4236 100644
--- a/composer.lock
+++ b/composer.lock
@@ -437,7 +437,7 @@
         },
         {
             "name": "drupal/core",
-            "version": "10.0.x-dev",
+            "version": "10.1.x-dev",
             "dist": {
                 "type": "path",
                 "url": "core",
@@ -680,7 +680,7 @@
         },
         {
             "name": "drupal/core-project-message",
-            "version": "10.0.x-dev",
+            "version": "10.1.x-dev",
             "dist": {
                 "type": "path",
                 "url": "composer/Plugin/ProjectMessage",
@@ -713,7 +713,7 @@
         },
         {
             "name": "drupal/core-vendor-hardening",
-            "version": "10.0.x-dev",
+            "version": "10.1.x-dev",
             "dist": {
                 "type": "path",
                 "url": "composer/Plugin/VendorHardening",
diff --git a/composer/Metapackage/CoreRecommended/composer.json b/composer/Metapackage/CoreRecommended/composer.json
index c87a0ac7eb2230ddad152d170d2bbd80686c2236..69a48d8de39e093b171946d79a747b5e80c43daf 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": "10.1.x-dev",
         "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 608bf284fe78dcaacef5ccbc8d89fa99160c7ea0..5a7a0e7b14a1682df5c396f6232f4b1fd944ebdd 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": "10.1.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 230fd76a3c38ab9269c3282fa5ea1bd3be178cc0..3c2eb498105f52fdedafc303407e34ec60ce7426 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 = '10.1.x-dev';
 
   /**
    * Core API compatibility.