diff --git a/composer.json b/composer.json
index 584c6c8..d495a1a 100644
--- a/composer.json
+++ b/composer.json
@@ -10,7 +10,7 @@
     "license": "LGPL-2.1",
 
 	"autoload": {
-        "psr-0": { "DHL\\": "DHL/" }
+        "classmap" : [ "DHL" ]
 	},
 
 	"authors": [