diff --git a/app.json b/app.json
new file mode 100644
index 0000000..034fbec
--- /dev/null
+++ b/app.json
@@ -0,0 +1,7 @@
+{
+    "scripts": {
+      "dokku": {
+        "predeploy": "POOL_SIZE=2 mix ecto.migrate"
+      }
+    }
+  }
\ No newline at end of file