diff --git a/composer.json b/composer.json
index 21d80648..f37b9ba1 100644
--- a/composer.json
+++ b/composer.json
@@ -21,9 +21,9 @@
         "doctrine/couchdb": "~1.0@dev",
         "elasticsearch/elasticsearch": "^6.0",
         "graylog2/gelf-php": "^1.4.2",
-        "jakub-onderka/php-parallel-lint": "^0.9",
         "php-amqplib/php-amqplib": "~2.4",
         "php-console/php-console": "^3.1.3",
+        "php-parallel-lint/php-parallel-lint": "^1.0",
         "phpspec/prophecy": "^1.6.1",
         "phpunit/phpunit": "^8.3",
         "predis/predis": "^1.1",
@@ -67,5 +67,6 @@
     },
     "config": {
         "sort-packages": true
-    }
+    },
+    "lock": false
 }
diff --git a/src/Monolog/Processor/GitProcessor.php b/src/Monolog/Processor/GitProcessor.php
index 1367ee6f..6abd3d8c 100644
--- a/src/Monolog/Processor/GitProcessor.php
+++ b/src/Monolog/Processor/GitProcessor.php
@@ -51,7 +51,7 @@ class GitProcessor implements ProcessorInterface
         }
 
         $branches = `git branch -v --no-abbrev`;
-        if (preg_match('{^\* (.+?)\s+([a-f0-9]{40})(?:\s|$)}m', $branches, $matches)) {
+        if ($branches && preg_match('{^\* (.+?)\s+([a-f0-9]{40})(?:\s|$)}m', $branches, $matches)) {
             return self::$cache = [
                 'branch' => $matches[1],
                 'commit' => $matches[2],