diff --git a/composer.json b/composer.json
index a67ba7b..ba06ed8 100644
--- a/composer.json
+++ b/composer.json
@@ -10,7 +10,7 @@
         }
     ],
     "require": {
-        "php": ">=5.5.9",
+        "php": ">=7.1",
         "composer-plugin-api": "^1.0|^2.0"
     },
     "autoload": {
@@ -20,7 +20,7 @@
     },
     "extra": {
         "branch-alias": {
-            "dev-main": "1.2-dev"
+            "dev-main": "1.3-dev"
         },
         "class": "Symfony\\Thanks\\Thanks"
     }
diff --git a/src/GitHubClient.php b/src/GitHubClient.php
index 0630cbb..dfee541 100644
--- a/src/GitHubClient.php
+++ b/src/GitHubClient.php
@@ -106,7 +106,7 @@ public function __construct(Composer $composer, IOInterface $io)
         }
     }
 
-    public function getRepositories(array &$failures = null, $withFundingLinks = false)
+    public function getRepositories(?array &$failures = null, $withFundingLinks = false)
     {
         $repo = $this->composer->getRepositoryManager()->getLocalRepository();