diff --git a/composer.json b/composer.json
index f248942..d745811 100644
--- a/composer.json
+++ b/composer.json
@@ -23,5 +23,10 @@
 	},
 	"autoload": {
 		"psr-4": { "yii\\swiftmailer\\": "" }
-	}
+	},
+    "extra": {
+        "branch-alias": {
+            "dev-master": "2.0.x-dev"
+        }
+    }
 }