diff --git a/composer.json b/composer.json
index 5e73c8aa..6e004fed 100644
--- a/composer.json
+++ b/composer.json
@@ -16,6 +16,6 @@
         "codacy/coverage": "^1.4"
     },
     "autoload": {
-        "psr-0": { "Sabberworm\\CSS": "lib/" }
+        "psr-0": { "Sabberworm\\CSS\\": "lib/" }
     }
 }