diff --git a/composer.json b/composer.json
index 11323fb..e540eb7 100644
--- a/composer.json
+++ b/composer.json
@@ -22,7 +22,7 @@
 		"php": ">=5.4.0",
 		"yiisoft/yii2": "*",
 		"yiisoft/yii2-composer": "dev-master",
-		"mpdf/mpdf": "dev-master"
+		"mpdf/mpdf": ">=5.7.0"
 	},
 	"autoload": {
 		"psr-4": {