diff --git a/composer.json b/composer.json
index 727e031..cf6b796 100644
--- a/composer.json
+++ b/composer.json
@@ -19,7 +19,10 @@
     "extra": {
         "_readme": [
             "By default Drupal loads the autoloader from ./vendor/autoload.php.",
-            "To change the autoloader you can edit ./autoload.php."
+            "To change the autoloader you can edit ./autoload.php.",
+            "This file specifies the packages.drupal.org repository.",
+            "You can read more about this composer repository at:",
+            "https://www.drupal.org/node/2718229"
         ],
         "merge-plugin": {
             "include": [
@@ -40,5 +43,11 @@
         "post-autoload-dump": "Drupal\\Core\\Composer\\Composer::ensureHtaccess",
         "post-package-install": "Drupal\\Core\\Composer\\Composer::vendorTestCodeCleanup",
         "post-package-update": "Drupal\\Core\\Composer\\Composer::vendorTestCodeCleanup"
+    },
+    "repositories": {
+        "drupal": {
+            "type": "composer",
+            "url": "https://packages.drupal.org/8"
+        }
     }
 }
diff --git a/composer.lock b/composer.lock
index 132fba5..1e4a402 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,8 +4,8 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#composer-lock-the-lock-file",
         "This file is @generated automatically"
     ],
-    "hash": "7d101b08e5ae002d827cd42ae9a4e344",
-    "content-hash": "60f7057617c6d995bf9946d0b12f0b5d",
+    "hash": "52fc7695a1e12588d8e01e82e1d5bf5f",
+    "content-hash": "59b6aeb5352b51af40b0f2f7e2b3af16",
     "packages": [
         {
             "name": "composer/installers",
@@ -1057,12 +1057,12 @@
             "source": {
                 "type": "git",
                 "url": "https://github.com/php-fig/log.git",
-                "reference": "1.0.0"
+                "reference": "fe0936ee26643249e916849d48e3a51d5f5e278b"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/php-fig/log/zipball/1.0.0",
-                "reference": "1.0.0",
+                "url": "https://api.github.com/repos/php-fig/log/zipball/fe0936ee26643249e916849d48e3a51d5f5e278b",
+                "reference": "fe0936ee26643249e916849d48e3a51d5f5e278b",
                 "shasum": ""
             },
             "type": "library",