diff --git a/composer.json b/composer.json
index 0555de72..71ba0793 100644
--- a/composer.json
+++ b/composer.json
@@ -80,6 +80,9 @@
         "url": "https://github.com/danog/dns"
     }],
     "scripts": {
+        "post-autoload-dump": [
+            "git submodule init && git submodule update"
+        ],
         "build": [
             "@docs",
             "@cs-fix",