diff --git a/composer.json b/composer.json
index 1dfea98..16d7c1f 100755
--- a/composer.json
+++ b/composer.json
@@ -29,8 +29,8 @@
 		"php": ">7.2 <8.0"
 	},
 	"autoload-dev": {
-		"psr-4": {
-			"\\": "src/"
-		}
+		"classmap": [
+			"src/"
+		]
 	}
 }