diff --git a/rector.php b/rector.php
index be2a4b6d8..9c3ad55d8 100644
--- a/rector.php
+++ b/rector.php
@@ -14,5 +14,5 @@ return RectorConfig::configure()
     ])
     ->withImportNames(importShortClasses: false)
     ->withAttributesSets(doctrine: true)
-    ->withPhpSets(php70: true)
+    ->withPhpSets(php71: true)
     ->withTypeCoverageLevel(0);
diff --git a/src/SiteConfig/GrabySiteConfigBuilder.php b/src/SiteConfig/GrabySiteConfigBuilder.php
index dfe433408..3c3a18056 100644
--- a/src/SiteConfig/GrabySiteConfigBuilder.php
+++ b/src/SiteConfig/GrabySiteConfigBuilder.php
@@ -119,7 +119,7 @@ class GrabySiteConfigBuilder implements SiteConfigBuilder
                 continue;
             }
 
-            list($fieldName, $fieldValue) = explode('=', $extraField, 2);
+            [$fieldName, $fieldValue] = explode('=', $extraField, 2);
             $extraFields[$fieldName] = $fieldValue;
         }