diff --git a/composer.json b/composer.json
index d6e9fc6..e70f7c1 100644
--- a/composer.json
+++ b/composer.json
@@ -13,6 +13,8 @@
     ],
     "require": {},
     "autoload": {
-        "ProVM\\": "src/"
+        "psr-4": {
+            "ProVM\\": "src/"
+        }
     }
 }