diff --git a/explorer/docs/README.md b/explorer/docs/README.md
index 6f56ce3f14..bb0d0be99a 100644
--- a/explorer/docs/README.md
+++ b/explorer/docs/README.md
@@ -18,6 +18,8 @@ We use the following:
 
 ## Development mode
 
+Copy the `.env.prod` file to `.env` to configure your environment. Using the live sandbox Explorer API is the best way to do development, so the prod settings are good.
+
 Run the following:
 
 ```