diff --git a/box.json b/box.json
index aaaf5a1f74..87431d13e6 100644
--- a/box.json
+++ b/box.json
@@ -4,6 +4,7 @@
         "Herrera\\Box\\Compactor\\Composer",
         "Herrera\\Box\\Compactor\\Json"
     ],
+    "compression": "GZ",
     "main": "bin/doctrine-migrations.php",
     "output": "build/doctrine-migrations.phar",
     "finder": [