diff --git a/examples/lb3-application/lb3app/server/middleware.json b/examples/lb3-application/lb3app/server/middleware.json
index 5bb3c7be7d15..14ddb46ad8d4 100755
--- a/examples/lb3-application/lb3app/server/middleware.json
+++ b/examples/lb3-application/lb3app/server/middleware.json
@@ -20,7 +20,7 @@
     "helmet#hsts": {
       "params": {
         "maxAge": 0,
-        "includeSubdomains": true
+        "includeSubDomains": true
       }
     },
     "helmet#hidePoweredBy": {},