diff --git a/composer.json b/composer.json
index e4897ba916..e355ba269e 100644
--- a/composer.json
+++ b/composer.json
@@ -44,7 +44,7 @@
         "phploc/phploc": "2.*",
         "dompdf/dompdf":"0.6.*",
         "tecnick.com/tcpdf": "6.*",
-        "mpdf/mpdf": "6.*",
+        "mpdf/mpdf": "dev-development",
         "zendframework/zend-validator": "2.5.*"
     },
     "suggest": {