diff --git a/src/Composer/Repository/FilesystemRepository.php b/src/Composer/Repository/FilesystemRepository.php
index 112e3da4b..a057abae3 100644
--- a/src/Composer/Repository/FilesystemRepository.php
+++ b/src/Composer/Repository/FilesystemRepository.php
@@ -83,6 +83,10 @@ class FilesystemRepository extends WritableArrayRepository
             $data[] = $dumper->dump($package);
         }
 
+        usort($data, function($a, $b) {
+            return strcmp($a['name'], $b['name']);
+        });
+
         $this->file->write($data);
     }
 }