diff --git a/composer.json b/composer.json
index f7198ad60f..8c21783ab8 100644
--- a/composer.json
+++ b/composer.json
@@ -58,6 +58,17 @@
             "drush/Commands/contrib/{$name}": ["type:drupal-drush"],
             "modules/custom/{$name}": ["type:drupal-custom-module"],
             "themes/custom/{$name}": ["type:drupal-custom-theme"]
+        },
+        "drupal-core-project-message": {
+            "post-install-cmd-message": [
+                "<bg=blue;fg=white>                                     </>",
+                "<bg=blue;fg=white>  You've installed the dependencies  </>",
+                "<bg=blue;fg=white>  for drupal/drupal.                 </>",
+                "<bg=blue;fg=white>                                     </>",
+                "",
+                "This package is meant for core development, and not intended to be installed",
+                "as a production site."
+            ]
         }
     },
     "autoload": {
diff --git a/post-install-cmd-message.txt b/post-install-cmd-message.txt
deleted file mode 100644
index afea3b9e41..0000000000
--- a/post-install-cmd-message.txt
+++ /dev/null
@@ -1,5 +0,0 @@
-<bg=blue;fg=white>                       </>
-<bg=blue;fg=white>  You have installed!  </>
-<bg=blue;fg=white>                       </>
-
-  * <fg=blue>Get rid</> of this message with <comment>composer remove drupal/core-project-message</>.