diff --git a/.env.example b/.env.example
index d843ca2a..61b75b5c 100644
--- a/.env.example
+++ b/.env.example
@@ -23,7 +23,7 @@ BACKEND_DOMAIN_NAME=backend.example.com
 # Obtain the following 2 values on the Pi Developer Portal (open develop.pi in the Pi Browser).
 
 # Domain validation key:
-DOMAIN_VALIDATION_KEY=todo_developer_portal
+DOMAIN_VALIDATION_KEY=d7ce8e9d92761c8c20a580b6e67fd4c3610fb96a46c4664c85d3e85e5e6baafb56aef4ff0635c6b18e015661b1bd168e961df15792a884c3efd9c1237a0b8e07
 # Pi Platform API Key:
 PI_API_KEY=todo_developer_portal