diff --git a/composer.json b/composer.json
index 456927c..7720647 100644
--- a/composer.json
+++ b/composer.json
@@ -24,7 +24,7 @@
     "autoload": {
         "psr-0": {
             "GeoIp2": "src/",
-            "" : "compat/"
+            "JsonSerializable" : "compat/"
          }
     }
 }