diff --git a/composer.json b/composer.json
index 9ce7358439b8..cac758e28a9a 100644
--- a/composer.json
+++ b/composer.json
@@ -8,7 +8,7 @@
         "wikimedia/composer-merge-plugin": "^1.4"
     },
     "replace": {
-        "drupal/core": "^8.7"
+        "drupal/core": "^8.8"
     },
     "minimum-stability": "dev",
     "prefer-stable": true,
diff --git a/composer.lock b/composer.lock
index 16e3f9a41124..ef5c03a5fe31 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "d764df12b2cff2be49d45e95ecbeb5d7",
+    "content-hash": "15aa825e18c7099ad637f9d55109db29",
     "packages": [
         {
             "name": "asm89/stack-cors",
diff --git a/core/lib/Drupal.php b/core/lib/Drupal.php
index 5050dc63572d..2eb4461a1422 100644
--- a/core/lib/Drupal.php
+++ b/core/lib/Drupal.php
@@ -82,7 +82,7 @@ class Drupal {
   /**
    * The current system version.
    */
-  const VERSION = '8.7.0-dev';
+  const VERSION = '8.8.0-dev';
 
   /**
    * Core API compatibility.