diff --git a/app.json b/app.json
index 1c6a98b..f641eac 100644
--- a/app.json
+++ b/app.json
@@ -19,6 +19,9 @@
     },
     {
       "url": "heroku/php"
+    },
+    {
+      "url": "https://github.com/piotras/heroku-buildpack-gettext.git"
     }
   ],
   "env": {