diff --git a/infrastructure/cloudformation/dt/top.yaml b/infrastructure/cloudformation/dt/top.yaml
index 943412f..acf6b81 100644
--- a/infrastructure/cloudformation/dt/top.yaml
+++ b/infrastructure/cloudformation/dt/top.yaml
@@ -39,7 +39,7 @@ Parameters:
   SubDomain:
     Type: String
     Description: The subdomain to be used by dt. (ex. `dt.example.com`)
-    Default: dt
+    Default: prod
 
   #------------
   # CloudWatch