diff --git a/dev-helpers/index.html b/dev-helpers/index.html
index 36c8cce9..59ed9497 100644
--- a/dev-helpers/index.html
+++ b/dev-helpers/index.html
@@ -3,6 +3,7 @@
 <html lang="en">
 <head>
   <meta charset="UTF-8">
+  <meta name="viewport" content="width=device-width, initial-scale=1">
   <title>Swagger UI</title>
   <link href="https://fonts.googleapis.com/css?family=Open+Sans:400,700|Source+Code+Pro:300,600|Titillium+Web:400,600,700" rel="stylesheet">
   <link rel="stylesheet" type="text/css" href="./swagger-ui.css" >
